How to prevent little terns from flying in

Abstract

To provide a method for preventing little terns from coming flying that can efficiently and simply prevent little terns from coming flying.SOLUTION: A method for preventing little terns from coming flying prevents the little terns from coming flying by forming, on a ground surface of a preventing coming flying zone 1, one or more camouflaged grass field zones 2, 2 with string-shaped or tape-shaped green field camouflaged materials 3, 3 laid along the ground surface of the preventing coming flying zone 1 so as to camouflage the preventing coming flying zone 1 with the grass field.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a method for preventing the arrival of little terns, which are designated as internationally endangered wild fauna and flora species, from flying in to breeding grounds. [Background technology]

[0002] The little tern is a migratory bird that is designated as an endangered species in Japan and an internationally endangered species under bilateral migratory bird treaties between Japan and Russia, Japan and the United States, Japan and China, and Japan and Australia.

[0003] This species of tern prefers riverbanks with low vegetation coverage, gravel areas on sandbars, and sandy beaches on the coast as breeding grounds, and is known to migrate to Japan in the spring to nest.

[0004] On the other hand, under the Wildlife Protection Act, it is prohibited to interfere with the breeding activities of little terns or harm their eggs or chicks. If little terns fly in and nest during construction work, the work will have to be halted, so taking measures to prevent them from flying in and making the area a nesting site is a challenge in terms of construction supervision.

[0005] Therefore, conventionally, measures such as painting the ground surface artificially green to disguise it as grass, spraying asphalt emulsion, and installing bird-repelling camouflage such as bird netting, crow models, and windsocks have been implemented depending on the site (see, for example, Non-Patent Document 1). [Prior art documents] [Non-patent literature]

[0006] [Non-Patent Document 1] "Guidelines for the Conservation and Consideration of Little Tern Breeding Sites," Wildlife Division, Natural Environment Bureau, Ministry of the Environment, March 2014 Summary of the Invention [Problem to be solved by the invention]

[0007] However, with the conventional techniques described above, the work of applying green paint to the ground surface and spraying black asphalt emulsion was time-consuming, and these had the problem of having to be removed when the area was to be used.

[0008] Furthermore, there was a risk that the effectiveness of mimicry that repels birds would be halved once the birds became accustomed to it.

[0009] In view of the above-mentioned problems, the present invention has been made with the object of providing a method for preventing the arrival of little terns that can simply and efficiently prevent the arrival of little terns. [Means for solving the problem]

[0010] The feature of the invention described in claim 1 to solve the above-mentioned conventional problems is as follows: It is composed of sand and gravel with low vegetation coverage. On the ground surface of the prevention area The above-mentioned fly-prevention area is composed of grass-colored string-like or tape-like grass camouflage material laid along the ground surface. The object of the present invention is to form one or more camouflaged grass areas and disguise the flying prevention areas as grasslands.

[0011] Claim 2 The invention described in is characterized by: Claim 1 In addition to the above configuration, the camouflaged grass area has one end of a grass-colored string-like or tape-like grass camouflaging material connected to the grass camouflaging material.

[0012] Claim 3 The invention described in is characterized by: Claim 1 or 2 In addition to the above configuration, the disguised grass area is disguised as grass by the use of multiple drainage materials, at least the upper ends of which are grass-colored and buried underground with their upper ends protruding above the ground surface of the flying prevention area.

[0013] Claim 4 The invention described in is characterized by: Claim 1 or 2 In addition to the above configuration, a mesh or mat-like grass simulating laying material is laid in the camouflaged grass area.

[0014] Claim 5 The invention described in is characterized by: Claims 1 to 4In addition to any one of the above configurations, the present invention aims to install a grass camouflage installation having one or more three-dimensional parts in the camouflaged grass area.

[0015] Claim 6 The invention described in is characterized by: Claim 5 In addition to the above configuration, the grass disguise installation has an insertion portion on the upper surface, into which grass, trees or imitation grass or trees are inserted.

[0016] Claim 7 The invention described in is characterized by: Claim 5 or 6 In addition to the above configuration, the outer surface of the grass camouflaging installation is painted grass-colored or has camouflaging tape attached to the outer surface.

[0017] Claim 8 The invention described in is characterized by: Claims 1 to 7 In addition to any one of the above configurations, the camouflaged grass area is provided with camouflaged materials that mimic birds, animals, or objects that terns avoid.

[0018] Claim 9 The invention described in is characterized by: Claim 8 In addition to the above configuration, the imitation object is a floating body or a kite. [Effects of the Invention]

[0019] The method for preventing the arrival of little terns according to the present invention is provided with the features of claim 1, and can easily prevent the arrival of little terns at construction sites and the like. It also makes it easy to disguise grassland.

[0020] Furthermore, in the present invention, Claim 2 By providing this configuration, the grass camouflage material is swayed by the wind, allowing it to be suitably disguised as grass, and a three-dimensional camouflaged grass area can be formed.

[0021] Furthermore, in the present invention, Claim 3By adopting this configuration, drainage materials such as plastic board drainage materials used for ground improvement and liquefaction prevention measures in flying prevention areas can be effectively utilized, and the site where ground improvement work is being carried out can be disguised as grass land and called a disguised grass area.

[0022] In addition, in the present invention, Claim 4 By providing the above configuration, the camouflaged grass area can be suitably camouflaged.

[0023] In addition, in the present invention, Claim 5 By adopting this configuration, the camouflage grass area can be formed three-dimensionally.

[0024] In addition, in the present invention, Claims 6 to 7 By adopting the above configuration, the grassland camouflaging installation can be disguised as being closer to a real herbaceous community or the like.

[0025] Furthermore, in the present invention, Claims 8 to 9 By providing this configuration, it is possible to effectively prevent the arrival of little terns. [Brief explanation of the drawings]

[0026] [Figure 1] 1 is a plan view showing an example of an embodiment of a method for preventing the arrival of little terns according to the present invention. [Figure 2] FIG. 2 is an enlarged perspective view showing the camouflage grass area in FIG. 1. [Figure 3] 1A is a perspective view showing the grass camouflaging installation of the same, and FIG. 1B is a perspective view showing an example of how the grass camouflaging installation is used. [Figure 4] FIG. 10 is an enlarged perspective view showing another example of a camouflaged grass area for the method for preventing the arrival of little terns according to the present invention. [Figure 5] FIG. 2 is a partially cutaway enlarged perspective view showing an example of the drain material. DETAILED DESCRIPTION OF THE INVENTION

[0027] Next, an embodiment of a method for preventing the arrival of little terns according to the present invention will be described based on the examples shown in Figures 1 to 3. In the figures, reference numeral 1 denotes an area where the arrival of little terns should be prevented, such as a construction site.

[0028] Prevention Area 1 is a construction site or similar site before or during construction that is composed of sand and gravel with low vegetation coverage, and is an area where prevention measures are required to prevent the site from becoming a nesting site for little terns during construction management.

[0029] To prevent little terns from flying into this prevention area 1, one or more camouflaged grass areas 2 are formed on the ground surface of the prevention area 1, disguising the prevention area 1 as grassland that is not suitable as a breeding ground for little terns.

[0030] The prevention zone 1 is based on grasslands where terns do not actually fly, and the area and shape of each camouflaged grass area 2, as well as the spacing between each camouflaged grass area 2, 2, etc. are determined taking into consideration the area, topography, and other conditions of the prevention zone 1.

[0031] As shown in Figure 2, the camouflaged grass area 2 is composed of grass-colored string- or tape-like grass camouflaging materials 3, 3... laid along the unevenness of the ground surface of the flying object prevention area 1, and is surrounded by grass camouflaging materials 3, 3... laid along the outline.

[0032] The grass disguise materials 3, 3... are fixed to the ground surface at predetermined locations spaced apart in the longitudinal direction by fixing members 4 such as nails or anchor materials, and the unfixed portions are in a bent state.

[0033] Although not specifically shown, the grassland camouflage materials 3, 3... may be laid not only along the outline but also in multiple pieces within the camouflaged grass area 2, and may be laid in any direction, vertically, horizontally or diagonally.

[0034] The grass camouflaging materials 3, 3... may be installed in a state where they are raised above the ground between the mounting rods 10, 10 of the grass camouflaging installations 6, 6 described later.

[0035] To the grass camouflaging materials 3, 3..., grass-colored string-like or tape-like grass camouflaging materials 5, 5... are connected at one end at intervals in the longitudinal direction, and the grass camouflaging materials 5, 5... can be disguised as real grass by being blown upward by the wind.

[0036] The grass camouflage materials 3, 3... and the grass camouflage materials 5, 5... are made of lightweight and flexible strings or tapes, and it is desirable that the grass camouflage materials 5, 5... be in the form of a strip so that they can easily be blown by the wind.

[0037] In addition, although not specifically shown, the grass camouflage materials 5, 5... can be disguised as more realistic grass by connecting one end of multiple string-like or tape-like branch and leaf camouflage materials made of the same material as the grass camouflage materials 5, 5...

[0038] In addition, in the camouflaged grass area 2, grass camouflaging installations 6, 6... are installed along the outline, allowing for three-dimensional camouflage. Note that the installation locations of the grass camouflaging installations 6, 6... are not limited to the outline, and they can be installed at any position within the camouflaged grass area 2.

[0039] The grass camouflaging installations 6, 6... have a three-dimensional portion 6a formed in the shape of a triangular pyramid or the like, and at least the outer surface of the three-dimensional portion 6a is painted grass-colored or, as shown in Figure 3(b), a camouflaging tape 7 that resembles grass is attached to the outer surface. Note that the shape of the three-dimensional portion 6a is not limited to a triangular pyramid, and can be any shape.

[0040] Furthermore, the grass disguise installations 6, 6... are not limited to those placed on the ground surface as in the above-mentioned embodiment, but may be, for example, long grass-colored board-shaped, stick-shaped or other objects that are installed by burying the lower part underground with the upper end protruding from the ground surface, and the part protruding from the ground surface being the three-dimensional part.

[0041] In this embodiment, grass color refers not only to the "dull yellow-green" defined by the JIS color standard, but also to colors that change with the seasons, such as grass color, light green, and the brown color of withered grass, as well as colors similar to the color of the grass in the surrounding area at the time of installation.

[0042] The top surface of the three-dimensional portion 6a is provided with an insertion portion 6b, into which grass, trees, or imitation grass or trees 8 can be inserted. Also, an attachment rod 10 for attaching a dummy object 9, which will be described later, may be inserted into the insertion portion 6b.

[0043] It should be noted that commercially available green pylons can be used for the grass disguise installations 6, 6.... Green pylons may be used as they are, or some may be colored grass green before use.

[0044] Furthermore, it is desirable to install in the camouflage grass area 2 camouflaged materials 9 that mimic birds, animals or objects that the little terns avoid.

[0045] The mimicry 9 may be, for example, a kite that resembles a hawk, which is a natural enemy of the little tern, or a float or windsock that resembles a crow.

[0046] Each camouflage material 9 is attached to an attachment rod 10 inserted into the insertion portion 6b of the grass camouflage installation 6, 6..., or to the grass camouflage material 3, 3..., etc., via a flexible attachment string 11, and is designed to move when blown by the wind.

[0047] In addition, although not specifically shown, grass-colored mesh or mat-like grass camouflage material may be laid in the camouflaged grass area 2. By laying this grass camouflaged material, the camouflaged grass area 2 will appear more like grass when viewed from above.

[0048] This method of preventing the arrival of little terns is configured in such a way that grass can be easily and quickly camouflaged by installing string or tape-like grass camouflaging materials 3,3... and grass camouflaging materials 5,5..., and installing grass camouflaging installations 6,6..., etc., and one or more camouflaged grass areas 2 can be efficiently established in the flight prevention area 1.

[0049] In addition, the camouflaged grass areas 2 can be easily removed, and multiple camouflaged grass areas 2 that have been installed can also be partially removed in accordance with the progress of construction work, etc. Furthermore, the grass camouflaged materials 3, 3... can be easily replaced even if they are damaged by strong winds, etc.

[0050] Therefore, in this prevention area 1, little terns can be made to mistakenly believe that the area is grassland, preventing them from flying in and building nests, and construction work and other such work can be carried out without having to be stopped.

[0051] In the above embodiment, the camouflaged grass area 2 is formed in a rectangular shape, but the shape of the camouflaged grass area 2 is not limited to a rectangular shape and can be any shape.

[0052] Furthermore, the aspects of the present invention are not limited to the above-described embodiments, and may be, for example, as shown in Figures 4 and 5, a plurality of drain materials 20, 20... with at least the upper ends of which are grass-colored and are buried in the ground with their upper ends protruding from the ground surface of the flying object prevention area 1, and the camouflaged grass area 2 is disguised as grass by these plurality of drain materials 20, 20.... Note that the same components as those in the above-described embodiments are given the same reference numerals and their explanations will be omitted.

[0053] The drain material 20, 20... uses, for example, a plastic board drain material as shown in Figure 5, and is provided with a core body 23 having water-passing grooves 21, 22 facing longitudinally on the front and back sides, and water-permeable filters 24, 24 covering both the front and back sides of the core body 23, with the water-permeable filters 24, 24 fixed to the front and back sides of the core body 23, respectively, and the entire material forming a flexible thin sheet.

[0054] The drain materials 20, 20... are not limited to the plastic board drain material shown in Figure 5, and for example, other types of plastic board drain materials may be used, or chemical drains made of porous material made of synthetic resin fibers may be used.

[0055] The core body 23 is made of synthetic resin and comprises a plurality of vertical wall members 23a, 23a... arranged parallel to each other and facing each other, and horizontal wall members 23b arranged between each of the vertical wall members 23a, 23a. In cross section, the horizontal wall members 23b are arranged in a staggered pattern, so that shallow water passage grooves 21 and deep water passage grooves 22 are formed alternately on the front and back of the core body 23.

[0056] The form of the core body 23 is not limited to that of the above embodiment, and may be, for example, one having a corrugated cross section.

[0057] The synthetic resin constituting this core body 23 contains a grass-green coloring agent or uses a grass-green resin, or the surface of the core body 23 is coated with grass-green paint, so that the entire core body 23 is formed in grass-green color.

[0058] The water-permeable filters 24, 24 are formed in the shape of a water-permeable sheet using nonwoven fabric made of polyester synthetic fiber.

[0059] The polyester synthetic fibers that make up these water-permeable filters 24, 24 are formed from a resin containing a grass-green colorant, or the surface of the synthetic fibers is colored grass-green, and the entire water-permeable filters 24, 24 are formed grass-green.

[0060] The grass color of the core 23 and the permeable filters 24, 24 that make up the drainage material 20, 20... does not only refer to the "dull yellow-green" of the JIS color standard, but also includes, for example, colors that change with the seasons, such as grass color, light green, and the brown color of dried grass, colors similar to the color of the grass in the surrounding area at the time of installation, and other green colors that can be formed using resins.

[0061] Furthermore, in the above-described embodiment, the entire core body 23 and the water-permeable filter 24 are described as being formed in grass green, but only the portions of the core body 23 and the water-permeable filter 24 that protrude above the ground surface may be formed or colored in grass green.

[0062] Furthermore, in the above embodiment, both the core 23 and the water-permeable filters 24, 24 are grass-green, but only the water-permeable filters 24, 24 covering the surface of the core 23 may be grass-green.

[0063] As shown in Figure 4, these drain materials 20, 20... are buried in a ground improvement target layer 25 such as soft ground with horizontal intervals (usually about 1.0 to 2.0 m) between each other and their upper ends protruding a certain length (100 mm to 1000 mm), and are used for ground improvement and liquefaction prevention measures. In the figure, reference numeral 26 denotes the upper layer of the ground, and reference numeral 27 denotes the impermeable layer below the ground improvement target layer 25. Furthermore, these drain materials 20, 20... may also be used simply to disguise the disguised grass area 2 as grassland in the flying debris prevention area 1, rather than as a ground improvement or liquefaction prevention measure.

[0064] On the other hand, at least the upper ends of these drain materials 20, 20... are formed in a grass color and protrude a certain length (100mm to 1000mm) from the ground surface, so when viewed from above, the upper ends of the drain materials 20, 20... protruding from the ground surface appear to be covered with multiple grasses, and the area where multiple drain materials 20, 20... are installed can be disguised as a grass area as a disguised grass area 2.

[0065] Furthermore, the upper ends of the flexible drain materials 20, 20... are protruded by a certain length (100 mm to 1000 mm), so that the upper ends protruding from the ground surface sway in the wind, making them look more like grass.

[0066] 4, by using the drainage materials 20, 20... in combination with the grass camouflaging material 3, the grass camouflaging material (not shown), and the grass camouflaging installation 6, the camouflaged grass area 2 can be made to look more like grassland. Note that the camouflaged grass area 2 may also be made up of only the drainage materials 20, 20... [Explanation of symbols]

[0067] 1. Prevention zone 2. Disguised Grass District 3 Grassland camouflage materials 4 Fixing member 5 Grass camouflage material 6. Grassland camouflage installations 7. Tape 8. Counterfeits 9 Mimicry 10 Mounting rod 11 Mounting cord 20 Drain material 21 Shallow drainage ditch 22 Deep water groove 23 Core material 24 Permeable filter 25. Ground improvement target layer 26 Upper layer 27 Impermeable layer

Claims

1. A method for preventing the arrival of little terns, characterized by forming one or more camouflaged grass areas on the ground surface of a prevention zone made up of sand and gravel with a low vegetation coverage rate, and laying grass-like string- or tape-like grass camouflaging material along the ground surface of the prevention zone, thereby disguising the prevention zone as grass.

2. 2. The method for preventing the arrival of little terns according to claim 1, wherein the camouflaged grass area has one end of a grass-colored string-like or tape-like grass camouflaging material connected to the grass camouflaging material.

3. A method for preventing the arrival of little terns as described in claim 1 or 2, wherein the camouflaged grass area is made up of multiple drainage materials, at least the upper ends of which are grass-colored, buried underground with their upper ends protruding above the ground surface of the fly-prevention area, and the multiple drainage materials disguise the area as grass.

4. 3. The method for preventing the arrival of little terns according to claim 1 or 2, wherein a mesh or mat-like grass camouflage material is laid in the camouflaged grass area.

5. The method for preventing the arrival of little terns according to any one of claims 1 to 4, wherein a grassland camouflaging installation having one or more three-dimensional parts is installed in the camouflaged grass area.

6. 6. The method for preventing the arrival of little terns according to claim 5, wherein the grass disguise installation has an insertion section on an upper surface thereof, and grass, trees or imitations of grass or trees are inserted into the insertion section.

7. 7. The method for preventing the arrival of little terns according to claim 5 or 6, wherein the outer surface of the grass camouflaging installation is painted in grass color or has camouflaging tape attached to the outer surface.

8. 8. The method for preventing the arrival of little terns according to claim 1, wherein the camouflaged grass area is provided with camouflaged materials that mimic birds, animals or objects that little terns avoid.

9. 9. The method for preventing the arrival of little terns according to claim 8, wherein the mimicry is a floating body or a kite.

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