JPH0647260Y2 - Bottomless birdhouse for woodpecker roost - Google Patents

Description

[Detailed description of the device]

[0001]

[Industrial application] The present invention, in the control of pine wilt disease, protect woodpeckers and other woodpeckers as natural enemies that prey on the larvae of the pine wilt larvae that carry the pathogenic pine nematode, Regarding birdhouses used to attract.

[0002]

BACKGROUND OF THE INVENTION AND PRIOR ART In general, woodpeckers are vulnerable to environmental changes, and many of them significantly reduce the number of inhabitants such as bears and nocigeras.

[0003] In addition, even in so-called common species such as Akagera, the breeding environment such as tree caves and the natural holes for roosts are insufficient. Recently, as the habitat of such woodpeckers worsens, these woodpeckers as natural enemies that prey on the larvae of the pine woodpecker beetle, which mediates the pine nematode, will be useful in controlling pine wilting. I'm having trouble.

Due to the above problems, the protection and attraction of these woodpeckers has become an urgent and important issue in Japan. As a drastic measure against this problem,
It is originally desirable to maintain and create their suitable habitat (forests with thick broad-leaved trees, mixed natural forests, etc.). But,
For example, in Japan, forests with thick broad-leaved trees are declining, and it takes a long time to form new trees, so long-term and drastic solutions by such methods are difficult and short-term. Has little effect on improving the environment.

Therefore, as an emergency measure, it is considered that woodpeckers are protected and attracted by erection of nest boxes, and proposals have been made in consideration of their habits and the like.

[0006] For example, most woodpeckers do not breed in ordinary nest boxes, but it is already known that new nests are dug each year and used for breeding. It is said that it is an effective method to install a log in the right place.

[0007] Since woodpeckers use wooden holes not only for breeding but also for roosting, it is important to take measures to protect and attract them at times other than the breeding season. For example, a birdhouse for roosts will be installed. Is being done.

[0008] As a conventional method for providing a hole for roosts of woodpeckers at a time other than the breeding season by a nest box, for example, in a study on pine wilt control, it is possible to attract red-bellied woodpeckers to an artificial roost nest. For the purpose, there are known conventional birdhouses that are generally used for small birds, and examples in which a synthetic resin bottomed hollow cylinder is erected on a tree.

However, although the conventional nest box or the like used in this example is used for woodpeckers to some extent, it has insufficient effects due to the following drawbacks, and a new proposal to replace it is proposed. I'm back.

A general birdhouse for birds and the like also uses other small crows for breeding, so that the birdhouse becomes dirty and unclean, and it is difficult to use red-bellied gerbils for roosting. It can be said that a person should clean such a dirty birdhouse, but it is time-consuming and unrealistic. The birdhouse is also used by other small birds for roosting, so it competes with the red-bellied gerbil.
Common birdhouses usually have 1 entrance, so rats, snakes,
There is no place to escape if a red-bellied bat is attacked by natural enemies such as weasels. When checking the usage of the birdhouse for the purpose of research, investigation, etc., it is troublesome because it is necessary to climb the construction tree and inspect the inside.

[0011]

[Problems to be solved by the invention] From such a background,
There is a demand for new proposals without the above-mentioned drawbacks, particularly for the development of artificial nesting boxes for roosts, and the present invention has been made from this point of view.

[0012] That is, the present invention provides a nest box for roosting woodpeckers such as woodpeckers such as woodpeckers that is not disturbed by other animals and is easy to maintain, thereby efficiently and safely protecting and attracting woodpeckers including woodpeckers. It was made for the purpose of doing.

[0013]

The bird house for woodpeckers and roosts of the present invention, which achieves the above object, is characterized by a hollow cylinder whose ceiling is closed and whose bottom is open. It consists of a bottomless birdhouse with one or more doorways on its side wall.

In the present invention, the reason why the above structure is adopted to eliminate the above-mentioned drawbacks is as follows. In other words, it has never been considered to remove the bottom part from a conventional nest box, but the motivation of the present inventor was to find woodpeckers such as bears and ageras to have a plurality of hollow holes. Paying attention to the fact that the wood caves with holes are used, and at that time, these woodpeckers cling to the side walls inside the holes and lie down, and from this habit of bear bears and ageras, the same woodpecker I thought that even my fellow Akagera could use a bottomless birdhouse with multiple holes as a roost for the Akagera.

The entrance / exit above the side wall of the birdhouse may be rectangular rather than circular, or many entrances / exits may be provided. It is also preferable to provide a large number of notches on the inner wall surface so that the inner wall surface can be easily set.

It is also preferable that the roof portion is provided with an eaves and that the natural burrows are tilted forward, so that the rear portion of the roof is also overhanged so as to be like that at the time of erection.
In addition, the overall shape of the birdhouse should be vertically long to keep the birds warm.

A wooden board is generally used as a material for forming the birdhouse, but the material is not limited to this, and logs, synthetic resins, processed wood buying products, concrete products, or composite products thereof can also be used. .

With the bottomless birdhouse of the present invention, woodpeckers,
Typically, the red-backed roost can be provided in a form that does not compete with other birds.

[0019]

Embodiments of the present invention will be described below.

As shown in FIG. 2, the length is 45 cm and the width is 8 c.
A four-sided side wall plate 2 made of pine having a thickness of 1 cm and a plate thickness of 1 cm was used to manufacture a columnar cylinder 1 having a flat cross section and open ends.
The ceiling surface, which is one end thereof, was closed with a rectangular roof plate 3 having a length of 25 cm and a width of 8 cm as shown in FIG. In addition, one of the side wall plates 2 forming the side wall of the columnar cylinder is
As shown in FIGS. 2 (a) and 2 (b), a circular entrance / exit 4 was bored, and a large number of notches 5 were provided on the inner wall surface so that red scallops could easily stop. In addition, 6 shows an entrance and exit as an open bottom of the cylindrical body 1.

The bottomless birdhouse described above is used by connecting a string 7 to it and erected on a tree 8 so as to obtain the state shown in FIG.

The inventor of the present invention puts the above bottomless nest box in 20 ha in an experimental forest 5 ha at the Tohoku Branch of the Forest Research Institute of Shimokura River, Morioka City.
The box was built in early October 1991.

As a result, on the night of October 21st, it was confirmed that four red foxes were using different birdhouses as roosts. Even after that, Akagera continues to use it as a roost.

The confirmation can be performed by turning on a light and looking from the bottom, and it was very easy to confirm.

[0025]

[Effect] According to the present invention, because there is no bottom, other small crows are not used for breeding, and because their birdhouses are not used by other small birds for roosting, it is used for roosting birds such as red scaping. Has the advantage of being used without competition.

Further, since there are at least two entrances and exits to the birdhouse at the bottom and the top, there is an effect that it is advantageous for escape when a red-bellied bat or the like is attacked by natural enemies such as rats, snakes and weasels.

Furthermore, the utilization status of the nest box can be easily checked, which is convenient for research and investigation.

[Brief description of drawings]

FIG. 1 is a view showing a state in which the bottomless birdhouse of the present invention is installed,

FIG. 2A is a vertical cross-sectional view showing an example of the nest box of the present invention, and FIG. 2B is a front view of the nest box.

[Explanation of symbols]

1 ... Column cylinder, 2 ... Side wall plate, 3 ... Roof body, 4
・ ・ ・ Doorways, 5 ・ ・ ・ Tips, 6 ・ ・ ・ Bottom doorways, 7
... strings, 8 ... trees.

Claims (3)

[Scope of utility model registration request] 1. A bottomless nest box for a woodpecker such as a woodpecker or the like, which is composed of a hollow cylindrical body having a closed ceiling portion and an open bottom portion, and provided with one or a plurality of inlets and outlets on a side wall of the cylindrical body. 2. A bottomless birdhouse for a woodpecker roost, according to claim 1, wherein a large number of notches are provided on the inner wall surface of the cylindrical body. 3. The bottomless nest box for a woodpecker roost, according to claim 1 or 2, wherein a hood protruding outward is provided on a ceiling portion of the hollow cylindrical body.