Method and device for constructing habitat of beaver in alpine valley region

Abstract

The present application relates to the technical field of wild animal habitat reconstruction, and particularly relates to a method and device for constructing habitat of otter in alpine valley region. The technical scheme is as follows: a method for constructing habitat of otter in alpine valley region, comprising the following steps: digging an artificial nest in an external environment where otters live by means of a constructing device, the artificial nest comprises a hole mouth, a tunnel, a nest, an expanded part, a tunnel and a hole mouth which are connected to each other in sequence, and the number of the nest and / or the expanded part is at least one; placing a nest model which is the same as the shape of the artificial nest in the artificial nest, and after the placement is completed, constructing an otter foraging environment near the artificial nest. The present application can artificially construct the habitat of otter in alpine valley region, restore and reconstruct the habitat of otter, and provide excellent foraging sites and habitat nests for otters.

Description

Technical Field

[0001] This invention relates to the field of wildlife habitat reconstruction technology, specifically to a method and apparatus for creating otter habitats in high mountain canyon areas. Background Technology

[0002] Otters belong to the family Mustelidae in the order Carnivora of the class Mammalia. There are approximately 13 species in 7 genera worldwide, with 3 genera and 3 species distributed in China, including the Eurasian otter, the Asian small-clawed otter, and the smooth-faced otter. The Eurasian otter has a wider distribution and is divided into 5 geographical subspecies based on morphological characteristics and geographical distribution. The Tibetan and Yunnan subspecies are the main ones found in high-altitude canyon areas. Otters are typical amphibious mammals, agile, with webbed toes, and are adept swimmers and divers. Otters have high requirements for habitat quality, often choosing areas with stable water flow, dense coastal vegetation, abundant food, no pollution, and minimal human disturbance for nesting. Their diet consists mainly of fish, but also includes frogs, rodents, and waterfowl.

[0003] Due to engineering activities such as hydropower stations and river management, otter habitats are frequently destroyed, resulting in a low otter population and constant threats to their wild survival. They are currently listed as a Class II protected wild animal in China. High mountain and canyon areas are among the most densely developed regions for hydropower stations. The construction and operation of these projects destroy otter dens and drastically alter their foraging environments, causing their suitable habitats to disappear. Therefore, in this context, developing otter habitats and providing new suitable habitats for otters is a necessary method and approach to protect this rare species. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a method and apparatus for creating otter habitats in high mountain and canyon areas. In particular, it addresses the artificial creation of otter habitats in high mountain and canyon areas, enabling the restoration and reconstruction of otter habitats and providing otters with excellent foraging grounds and nesting sites.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This invention discloses a method for creating otter habitats in high mountain canyons, comprising the following steps: excavating artificial nests in the external environment where otters are expected to inhabit using a construction device; the artificial nests include an entrance, a passage, a nest, a bulge, a passage, and an entrance that are sequentially connected to each other, with at least one nest and / or bulge; placing a nest model of the same shape inside the artificial nest; and after placement, constructing an otter foraging environment near the artificial nests.

[0007] Preferably, the nest model is lined with dead branches and leaves of dominant herbaceous plants from the otter's native habitat, with a thickness of 5-10 cm.

[0008] Preferably, the process of constructing the otter foraging environment is as follows: in the area near the artificial nest, a habitat for otter prey is constructed to create a foraging area for the otter.

[0009] Preferably, a foraging habitat for prey is created along the horizontal direction of the submersion line for 1 to 2 km, and an environment is constructed for otters to hunt in the water both on land and on the shore.

[0010] Correspondingly, a device for creating otter habitat in high mountain canyons includes a drill cylinder and a drill bit disposed at one end thereon. Both the drill bit and the rotary drum are equipped with helical blades. An adjustable secondary digging mechanism is disposed on the side wall at the connection between the drill cylinder and the drill bit. The secondary digging mechanism includes a positioning frame disposed on the outer wall of the drill cylinder and arranged circumferentially thereon. Multiple positioning frames are provided. A retractable digging head is disposed within the positioning frame. The other end of the digging head is located inside the drill cylinder and is controlled to extend from the positioning frame by a telescopic component.

[0011] Preferably, a fixed cylinder is coaxially arranged inside the drill barrel, the excavating head is connected to the side wall of the fixed cylinder, a guide cylinder is coaxially arranged inside the fixed cylinder, the telescopic component is arranged inside the guide cylinder, a guide rope is connected to the excavating head, the guide rope is connected to the positioning plate, and the output end of the telescopic component is fixed to the positioning plate.

[0012] Preferably, the excavator head includes a fixing block fixed to the side wall of the fixing cylinder. The fixing block passes through the drill cylinder and extends into the positioning frame. A power frame is fitted on the fixing block. One end of the power frame is located inside the positioning frame. A through hole is provided on the side wall of the positioning frame corresponding to the end face of the power frame. The through hole is adapted to the end face of the power frame. The end face of the power frame is provided with bullet heads facing the same direction. The guide rope is connected to the power frame. The fixing block and the power frame are connected by a first spring. In the initial state, the first spring is in a compressed state.

[0013] Preferably, the center of the fixing block is provided with a cylindrical groove with an opening facing the power frame. A telescopic rod is fixed in the cylindrical groove, and the other end of the telescopic rod is fixed to the inner side wall of the power frame. The first spring is sleeved on the telescopic rod, and its two ends are respectively fixed in the cylindrical groove and on the inner wall of the power frame.

[0014] Preferably, the top and bottom ends of the power frame are respectively connected to guide plates, one end of the guide plate extends into the guide cylinder and is connected to the guide rope, the positioning plate is located above the guide cylinder, the other end of the guide rope is fixed to the positioning plate, and a plurality of guide rods are provided at the top of the guide cylinder, the guide rods passing through the positioning plate.

[0015] Preferably, a baffle is fixed circumferentially at the other end of the drill barrel via a bearing, a sleeve is fixed on the baffle, the sleeve is fitted onto the drill barrel, a mounting shell is fixed at the other end of the sleeve, a gear is fitted and fixed inside the mounting shell and on the drill barrel, the gear is driven by a motor, a handrail is fixed on the sleeve, and a support is connected to the sleeve via a hinge ball.

[0016] The present invention has the following beneficial effects:

[0017] 1. This invention aims to protect otters by artificially creating otter habitats in high mountain and canyon areas, providing them with excellent foraging grounds and nests. During the habitat construction process, river bends or tributaries with gentle slopes are selected. Nests are excavated and nest models are installed, taking into account local habitats or artificially constructed external environments. Nearby rivers are used to create foraging habitats for predators, serving as foraging areas for the otters. Long-term video monitoring is then conducted to assess the utilization rate of the artificial nests and foraging environments, optimize the habitat environment, and ultimately restore and reconstruct the otter habitat, effectively protecting it.

[0018] 2. This invention employs a drill barrel and spiral blades for drilling, excavating tunnels, bulges, and nests. The excavation of the nest and bulge is achieved using a retractable excavator head mounted on the side wall of the drill barrel. The excavator head contains a first spring. Initially, the first spring is compressed, maintained by a guide rope and a telescopic component. Then, as the telescopic component extends, the power frame on the excavator head extends beyond the spiral blades, thus drilling the nest and bulge into the side wall of the borehole. Nest models are then placed directly into the boreholes at both ends to construct the otter nest. The entire process is simple and convenient, with low environmental requirements. Compared to directly digging pits to bury the nest models, it has less impact on surrounding vegetation, eliminating the need for deep pits. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of an otter burrow.

[0020] Figure 2 This is a schematic diagram of the device structure for the present invention;

[0021] Figure 3 for Figure 2 A partial sectional view of the drill barrel on the foundation (with dashed lines as nodes);

[0022] Figure 4 for Figure 2 View from AA direction;

[0023] Figure 5 for Figure 4 Enlarged view of part A in the middle;

[0024] Figure 6 for Figure 4 Middle BB direction view;

[0025] Figure 7 This is a schematic diagram showing the connection between the gears, motor, and drill barrel (only the connection of these three components is shown, and the rest of the structure is omitted).

[0026] Figure 8 This diagram illustrates another configuration of the helical blades on the drill barrel.

[0027] In the diagram: 1. Drill barrel; 2. Drill bit; 3. Spiral blade; 4. Positioning frame; 5. Telescopic component; 6. Fixed cylinder; 7. Guide cylinder; 8. Guide rope; 9. Positioning plate; 10. Fixed block; 11. Power frame; 12. Through hole; 13. Bullet head; 14. First spring; 15. Cylindrical groove; 16. Telescopic rod; 17. Guide plate; 18. Guide rod; 19. Bearing; 20. Baffle; 21. Sleeve; 22. Mounting shell; 23. Gear; 24. Motor; 25. Handrail; 26. Hinge ball; 27. Support; 28. Slider; 29. ​​Positioning post; 30. Second spring; 31. Arc plate; 32. Limiting groove; 33. Roller; 34. Opening; 35. Passage; 36. Expansion part; 37. Nest. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Unless otherwise specified, the technical means used in the implementation examples are conventional means well known to those skilled in the art.

[0030] 1. This invention discloses a method for creating otter habitats in high mountain canyon areas, comprising the following steps: excavating artificial nests in the otter's habitat using a construction device, referring to... Figure 1 As shown, the artificial nest comprises an entrance 34, a passage 35, a nest 37, a bulging section 36, and an entrance 34 connected in sequence, with an overall V-shaped shape. The number of the nest and / or bulging section is at least one; multiple nests can increase the underground space. A nest model of the same shape is placed inside the artificial nest. After placement, an otter foraging environment is created near the artificial nest. The nest model is lined with fallen leaves and branches of dominant herbaceous plants from the otter's native habitat, with a thickness of 5-10 cm.

[0031] Furthermore, the process of constructing the otter foraging environment is as follows: in the area near the artificial nest, a habitat for otter prey is constructed to create a foraging area for the otter, that is, a foraging habitat for prey is created along the horizontal direction of the flood line for 1 to 2 km, and an environment for otters to go into the water to forage is constructed both on land and on the shore.

[0032] The specific process of creating otter habitats is as follows:

[0033] (1) Habitat location selection. Before the hydropower station is submerged, select areas with a slope of less than 10° and dense vegetation with large rocks in the bends of the main stream or tributaries of the river, at the annual water level and the highest water level, as specific construction sites for the construction of artificial habitats for otters, with an area of ​​at least 100 square meters.

[0034] (2) Habitat External Environment Construction. Habitat external environment construction includes two methods: Method 1: Artificial construction. This method simulates the species composition and community structure characteristics of natural communities to create an external environment for otter habitats. Dominant species from both sides of river valleys in high mountain and canyon areas, such as *Rosa yunnanensis*, *Rosa latifolia*, *Myrica rubra*, *Rosa latifolia*, *Cephalotaxus fortunei*, *Polygonum chinense*, *Polygonum hydropiper*, *Selaginella tamariscina*, *Imperata cylindrica*, and *Elsholtzia ciliata*, are selected and planted according to a standard of 300 shrubs per acre and 30% herbaceous cover. The plants can be purchased directly or obtained from the hydropower station project area. After planting, meticulous maintenance is carried out to ensure a survival rate of over 85% for the artificially planted vegetation. Method 2: For areas with good existing vegetation, the habitat is directly utilized.

[0035] (3) Construction and installation of artificial otter nests. An artificial otter nest consists of four parts: an entrance, a passageway, a bulging section, and a nest. The entrance is an irregular circle with a diameter of 30cm × 25cm; the passageway gradually widens, with a diameter of 30cm × (26~30)cm and a length of 30~40cm; the bulging section has a diameter of 54cm × 50cm, is irregularly curved, and has a length of approximately 20~30cm; the nest is 1×0.6×0.8m and is disc-shaped. The entire nest is open at both ends. One side of the entrance connects to the passageway, which connects to the bulging section, which connects to the nest. The nest is then connected to the bulging section and the passageway on the other side.

[0036] The artificial nest is directly printed into a model using 3D printing technology. Then, fallen leaves and branches of dominant herbaceous plants from the otter's native habitat, such as Imperata cylindrica, Polygonum chinense, and Ligustrum lucidum, are used to line the interior of the nest, with a thickness of approximately 5-10 cm. The nest model consists of two parts, with the lowest point or the lowest part of the nest itself as the dividing point. These parts are inserted into the artificial nest through openings at both ends. After completion, the soil layer on top of the nest model is tapped to remove loose soil, thus covering the nest model.

[0037] Compared to existing technologies, which involve digging a 50-80cm deep pit and filling it with soil and rocks, leaving the two ends exposed, and planting plants such as *Polygonum chinense* and *Polygonum hydropiper* around the nest to conceal it, the nest-building device disclosed in this invention is better adaptable to the environment. For locations where digging is impossible or inconvenient, a drilling method is used, combined with a secondary digging mechanism, to successfully drill holes and selectively excavate the enlarged portion and nest, while controlling the size of the enlarged portion and nest as needed. When using the device, one side is generally dug first, then the other, ensuring the hole diameter allows the nest model to be successfully placed inside.

[0038] (4) Construction of Otter Foraging Environment. The construction of otter foraging areas mainly focuses on the habitat and foraging scene of their primary prey, the schizothorax fish. Near otter dens, a 1-2 km long schizothorax foraging habitat is created horizontally along the flood line, thus providing a foraging area for the otters. Specifically, this includes artificially constructing an irregular riverbed 1-2 km long, with natural revetments at a 0-5° angle towards the river. The riverbed bottom is covered with pebbles, rocks, and a small amount of silt to create a substrate for the schizothorax fish. Rock piles, approximately 0.3 m high and 0.5-1 square meters in area, are laid at 100 m intervals along the bank, surrounded by rock paving to create a buffer zone, providing an environment for otters to enter the water and forage. Through these construction measures, a near-natural foraging environment for otters is created. Depending on the quality of the food, schizothorax fish can be artificially released if necessary.

[0039] (5) Monitoring the utilization efficiency of artificially constructed habitats. Infrared cameras were installed in the otter foraging areas and near the nests in the artificially constructed habitats. The camera apertures were pointed at the entrance and upper and lower points of the artificial nests. The monitoring was carried out for one year to assess the utilization rate of the artificial nests and foraging environment.

[0040] (6) Optimize and adjust the environment of artificial habitats. By analyzing the terrain location, vegetation composition, and rock pile shape of the effective utilization scenarios, parameters of unused areas are optimized and adjusted.

[0041] refer to Figures 2-7 This invention discloses a habitat creation device for otters in high mountain canyon areas, which constructs artificial nests by drilling. Compared to the existing technology of directly digging and filling pits, the creation device disclosed in this invention has a wider range of applications and lower requirements for location.

[0042] The construction apparatus disclosed in this invention includes a drill barrel 1 and a drill bit 2 disposed at one end thereon. The drill bit is conical and fixed to one end of the drill barrel. Both the drill bit 2 and the drill barrel are provided with helical blades 3. In order to set up a secondary excavation mechanism, the helical blades on the drill bit and the drill barrel are not connected, but disconnected. The distance of the disconnection is adapted to the height of the secondary excavation mechanism.

[0043] Specifically: A secondary digging mechanism with adjustable size is provided on the side wall at the connection between the drill barrel 1 and the drill bit 2. The secondary digging mechanism includes a positioning frame 4 set on the outer wall of the drill barrel 1 and arranged circumferentially thereon. The positioning frame is connected to the drill barrel. Multiple positioning frames 4 are provided and located on the same horizontal plane. A retractable digging head is provided inside the positioning frame 4. The other end of the digging head is located inside the drill barrel 1 and the digging head is controlled to extend out of the positioning frame 4 by the telescopic component 5.

[0044] Furthermore, a fixed cylinder 6 is coaxially arranged at the bottom inner part of the drill barrel 1. The excavating head is connected to the side wall of the fixed cylinder 6. A guide cylinder 7 is coaxially arranged inside the fixed cylinder 6. The telescopic component 5 is arranged inside the guide cylinder 7. A guide rope 8 is connected to the excavating head. The guide rope 8 is connected to the positioning plate 9. The output end of the telescopic component 5 is fixed to the positioning plate 9. The telescopic component includes, but is not limited to, an electric push rod. By activating the telescopic component, the positioning plate is driven to move up and down, which in turn drives the guide rope to move up and down, thereby controlling the size of the excavating head extending outside the positioning frame. In order to excavate the bulging part and the nest through the secondary excavation device, the size of the excavating head extending outside the positioning frame must exceed the edge of the spiral blade.

[0045] Specifically: The excavator head includes a fixing block 10 fixed to the side wall of the fixing cylinder 6. The fixing block 10 passes through the drill cylinder 1 and extends into the positioning frame 4. A power frame 11 is fitted onto the fixing block 10. One end of the power frame 11 is located inside the positioning frame 4. A through hole 12 is provided on the side wall of the positioning frame 4 corresponding to the end face of the power frame 11. The through hole 12 is adapted to the end face of the power frame 11, with the outward-facing end of the power frame located inside the through hole. The end face of the power frame 11 is provided with bullet heads 13 facing the same direction. The number of bullet heads is set as needed. The guide rope 8 is connected to the power frame 11. The fixing block 10 and the power frame 11 are connected by a first spring 14. In the initial state, the first spring 14 is in a compressed state, and there is a certain distance between the positioning plate and the guide cylinder. The telescopic component controls the positioning plate to move downward, thereby causing the power frame to move outward under the action of the first spring. The elastic force of the first spring determines the distance the power frame extends outward, and the distance between the positioning plate and the guide cylinder determines the stroke of the telescopic component.

[0046] Furthermore, a cylindrical groove 15 with an opening facing the power frame 11 is provided at the center of the fixing block 10. A telescopic rod 16 is fixed inside the cylindrical groove 15, and the other end of the telescopic rod 16 is fixed to the inner wall of the power frame 11. The first spring 14 is sleeved on the telescopic rod 16, with its two ends fixed to the cylindrical groove 15 and the inner wall of the power frame 11, respectively. It should be noted that the two ends of the first spring are fixed at the same positions as the telescopic rod, and the telescopic rod is a sleeve-type telescopic rod, which is designed to increase the connection strength between the fixing block and the power frame.

[0047] Furthermore, the two sides of the power frame are beveled, as shown in the reference. Figure 4 , Figure 5 As shown, this design allows the open end of the power frame to mate with the fixed block, increasing the friction between the power frame port and the fixed block and preventing the power frame from easily detaching from the fixed block. Simultaneously, to further prevent the power frame from detaching from the fixed block, a limiting groove 32 is provided on the side wall of the end of the fixed block that extends into the positioning frame. Furthermore, an elastic block corresponding to the limiting groove 32 is provided on the inner wall of the open end of the power frame. The elastic block can be embedded in the inner wall of the power frame and connected by a spring. When the power frame moves to the position of the limiting groove, the elastic block extends into the limiting groove, thereby preventing the power frame from detaching from the fixed block.

[0048] Furthermore, guide plates 17 are connected to the top and bottom ends of the power frame 11, respectively. The guide plates are arranged horizontally, and one end of the guide plate 17 extends into the guide cylinder 7 and is connected to the guide rope 8. The guide plates enable the power frame to move in a straight line better, and to a certain extent avoid the uneven force on the upper and lower ends of the power frame caused by friction between the guide rope and the fixed cylinder when the guide rope is directly connected to the power frame, which would affect the extension of the power frame.

[0049] Furthermore, to further increase the stability of the dynamic frame during movement, sliders 28 are provided on both side walls of the positioning frame 4. The sides of the sliders fit against the two sides of the dynamic frame. At the same time, positioning grooves are provided on the two inner side walls of the positioning frame 4, and second springs 30 are provided in the positioning grooves. Additionally, positioning pins 29 extending into the positioning grooves are provided on the side walls of the sliders 28. Under the action of the second springs, the sliders are pressed against the side walls of the dynamic frame.

[0050] Furthermore, the positioning plate 9 is located above the guide cylinder 7, and the other end of the guide rope 8 is fixed to the positioning plate 9. The top end of the guide cylinder 7 is provided with multiple guide rods 18, which pass through the positioning plate 9. The arrangement of the guide rods ensures that the positioning plate moves straight up and down, preventing the guide plate from tilting during movement.

[0051] Furthermore, to prevent wear between the guide rope and the hole on the guide cylinder through which the guide rope passes, a roller 33 is installed in the hole. The guide rope 8 extends into the guide cylinder 6 through the roller 33 and is connected to the positioning plate 9.

[0052] Furthermore, a baffle 20 is fixed circumferentially at the other end of the drill barrel 1 via a bearing 19. A spiral blade is positioned between the baffle and the drill bit on both the drill barrel and the drill bit. The baffle prevents soil generated during drilling from piling up under the operator's feet and from affecting other structures at the end of the drill barrel. A sleeve 21 is fixed to the baffle 20, and the sleeve 21 is fitted onto the drill barrel 1, with both coaxially arranged. A mounting shell 22 is fixed to the other end of the sleeve 21. A gear 23 is fitted inside the mounting shell 22 and onto the drill barrel 1. The gear 23 is driven by a motor 24. The mounting shell primarily protects the gear and motor. A power gear is located at the output end of the motor and meshes with the gear to drive the motor and thus rotate the drill barrel. A handrail 25 is fixed to the sleeve 21, and a support 27 is connected to the sleeve 21 via a hinge ball 26. This hinge ball connection allows for adjustment of the drill barrel's tilt angle. A bracket can be fixed to the bottom of the support as needed. The support can be U-shaped to support the drill barrel. Depending on the length of the sleeve, multiple bearings can be installed to stabilize the sleeve, mounting shell, and baffle.

[0053] refer to Figure 8 As shown, the spiral blade of the present invention has another embodiment: an arc-shaped plate 31 is provided on the drill cylinder between the baffle and the positioning frame. There are two arc-shaped plates, which are combined to wrap around the drill cylinder. The arc-shaped plates are fixed to the drill cylinder with bolts. The spiral blade is provided on the outer wall of the arc-shaped plate. After the two arc-shaped plates are combined, the spiral blades on them are also combined together. The spiral blade is designed to be detachable, and spiral blades of different widths can be replaced to achieve the purpose of adjusting the borehole diameter.

[0054] When using this invention, after placing the support in the designated position, manually adjust the orientation of the drill barrel, start the motor, and begin drilling. Once the required depth or length of the borehole is reached, turn off the motor, activate the telescopic component, and control its stroke to control the length of the power frame extending beyond the positioning frame. After adjustment, start the motor again, and the drill barrel rotates with the power frame. The power frame and its bullet head further excavate the borehole to enlarge its diameter, thereby excavating nests and enlarged sections. After excavation, activate the telescopic component to reset the power frame. If multiple enlarged sections or nests need to be excavated, after resetting the power frame, drill the drill barrel downwards a certain distance or extend it further into the borehole, using the above-described operation. Throughout the process, depending on requirements, after drilling to the designated depth or length, enlarged sections and nests can be drilled at different locations within the borehole. The diameter of the nests and enlarged sections is determined by the length of the power frame extending beyond the positioning frame. Alternatively, during the drilling process, after reaching the designated position, drill the enlarged section. After drilling the enlarged section, continue drilling downwards. However, this may result in soil generated during continued drilling burying the enlarged section. The specific order of operations can be adjusted according to actual needs. After drilling is complete, place the nest model into the borehole through both ends. Once the nest model is fully inserted, align it at the lowest point to complete the placement of the nest model. After placement, tamp down the soil to firmly secure the nest model.

[0055] It should be noted that the device disclosed in this invention initially forms a ring around the borehole when excavating nests and enlarged parts, and does not excavate them all at once. Figure 1 As shown, when placing the nest model, you only need to ensure that the excavated nest and bulge correspond to the nest and bulge on the nest model respectively. This is equivalent to ensuring that the bulge and nest on the nest model can fall into the nest and bulge inside the borehole.

[0056] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0057] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A method for creating otter habitats in high mountain canyon areas, characterized in that: Includes the following steps: Artificial nests are excavated in the outdoor environment where otters are expected to inhabit. The artificial nests include an entrance, a passage, a nest, a bulge, a passage, and an entrance that are connected in sequence. The number of nests and / or bulges is at least one. A nest model with the same shape is placed inside the artificial nest. After the placement is completed, an otter foraging environment is created near the artificial nest. The excavation device includes a drill barrel (1) and a drill bit (2) set at one end thereon. Both the drill bit (2) and the drill barrel are provided with spiral blades (3). An adjustable secondary excavation mechanism is provided on the side wall at the connection between the drill barrel (1) and the drill bit (2). The secondary excavation mechanism includes a positioning frame (4) set on the outer wall of the drill barrel (1) and arranged along its circumference. Multiple positioning frames (4) are provided. A telescopic excavation head is set inside the positioning frame (4). The other end of the excavation head is located inside the drill barrel (1) and the excavation head is controlled to extend out of the positioning frame (4) by a telescopic component (5). A fixed cylinder (6) is coaxially arranged inside the drill barrel (1). The excavating head is connected to the side wall of the fixed cylinder (6). A guide cylinder (7) is coaxially arranged inside the fixed cylinder (6). The telescopic component (5) is arranged inside the guide cylinder (7). A guide rope (8) is connected to the excavating head. The guide rope (8) is connected to the positioning plate (9). The output end of the telescopic component (5) is fixed to the positioning plate (9). The excavator head includes a fixed block (10) fixed on the side wall of the fixed cylinder (6). The fixed block (10) passes through the drill cylinder (1) and extends into the positioning frame (4). A power frame (11) is fitted on the fixed block (10). One end of the power frame (11) is located inside the positioning frame (4). A through hole (12) is provided on the side wall of the positioning frame (4) corresponding to the end face of the power frame (11). The through hole (12) is adapted to the end face of the power frame (11). A bullet head (13) with the same orientation is provided on the end face of the power frame (11). The guide rope (8) is connected to the power frame (11). The fixed block (10) and the power frame (11) are connected by a first spring (14). In the initial state, the first spring (14) is in a compressed state.

2. The method for creating otter habitats in high mountain canyon areas according to claim 1, characterized in that: The nest model is lined with dead branches and fallen leaves of the dominant herbaceous plants in the otter's native habitat, with a thickness of 5-10 cm.

3. The method for creating otter habitats in high mountain canyon areas according to claim 1, characterized in that: The process of constructing the otter's foraging environment is as follows: in the area near the artificial nest, a habitat for the otter's prey is constructed to create a foraging area for the otter.

4. The method for creating otter habitats in high mountain canyon areas according to claim 3, characterized in that: Create a 1-2 km horizontal foraging habitat for prey along the flood line, and establish an environment for otters to hunt both on land and in the water.

5. A method for creating otter habitat in alpine canyons according to any one of claims 1 to 4, comprising a drill cylinder (1) and a drill bit (2) disposed at one end thereof, characterized in that: Both the drill bit (2) and the drill barrel are provided with spiral blades (3). An adjustable secondary digging mechanism is provided on the side wall at the connection between the drill barrel (1) and the drill bit (2). The secondary digging mechanism includes a positioning frame (4) provided on the outer wall of the drill barrel (1) and arranged along its circumference. Multiple positioning frames (4) are provided. A telescopic digging head is provided inside the positioning frame (4). The other end of the digging head is located inside the drill barrel (1) and the digging head is extended from the positioning frame (4) by a telescopic component (5). A fixed cylinder (6) is coaxially arranged inside the drill barrel (1). The excavating head is connected to the side wall of the fixed cylinder (6). A guide cylinder (7) is coaxially arranged inside the fixed cylinder (6). The telescopic component (5) is arranged inside the guide cylinder (7). A guide rope (8) is connected to the excavating head. The guide rope (8) is connected to the positioning plate (9). The output end of the telescopic component (5) is fixed to the positioning plate (9). The excavator head includes a fixed block (10) fixed on the side wall of the fixed cylinder (6). The fixed block (10) passes through the drill cylinder (1) and extends into the positioning frame (4). A power frame (11) is fitted on the fixed block (10). One end of the power frame (11) is located inside the positioning frame (4). A through hole (12) is provided on the side wall of the positioning frame (4) corresponding to the end face of the power frame (11). The through hole (12) is adapted to the end face of the power frame (11). A bullet head (13) with the same orientation is provided on the end face of the power frame (11). The guide rope (8) is connected to the power frame (11). The fixed block (10) and the power frame (11) are connected by a first spring (14). In the initial state, the first spring (14) is in a compressed state.

6. The apparatus used in the method for creating otter habitats in high mountain canyons according to claim 5, characterized in that: The center of the fixed block (10) is provided with a cylindrical groove (15) with an opening facing the power frame (11). A telescopic rod (16) is fixed in the cylindrical groove (15). The other end of the telescopic rod (16) is fixed on the inner side wall of the power frame (11). The first spring (14) is sleeved on the telescopic rod (16), and its two ends are fixed in the cylindrical groove (15) and on the inner wall of the power frame (11), respectively.

7. The apparatus used in the method for creating otter habitats in high mountain canyons according to claim 5, characterized in that: The top and bottom ends of the power frame (11) are respectively connected to guide plates (17). One end of the guide plate (17) extends into the guide cylinder (7) and is connected to the guide rope (8). The positioning plate (9) is located above the guide cylinder (7). The other end of the guide rope (8) is fixed to the positioning plate (9). The top end of the guide cylinder (7) is provided with multiple guide rods (18). The guide rods (18) pass through the positioning plate (9).

8. The apparatus used in a method for creating otter habitats in high-altitude canyon areas according to any one of claims 5 to 7, characterized in that: A baffle (20) is fixedly mounted on the other end of the drill barrel (1) via a bearing (19). A sleeve (21) is fixed on the baffle (20). The sleeve (21) is mounted on the drill barrel (1). A mounting shell (22) is fixed on the other end of the sleeve (21). A gear (23) is mounted inside the mounting shell (22) and on the drill barrel (1). The gear (23) is driven by a motor (24). A handrail (25) is fixed on the sleeve (21). A support (27) is connected to the sleeve (21) via a hinge ball (26).

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