WILD BIRD NESTING STRUCTURE IN RETAINING WALL

摘要

PROBLEM TO BE SOLVED: To provide a nesting environment for birds which induces nesting by boring nest tunnels from the opening on a retaining wall, continuously into the depth, in e.g., common kingfisher, pied kingfisher, bank swallow, or the like, which form nests by boring tunnels into cliffs, and provide a bird nesting structure in the retaining wall that permits the bird to form the nesting structure inexpensively on the retaining wall in a shortened work term.;SOLUTION: An opening 4 for a bird to pass through is bored on a covering plate 1 constituting the retaining wall, meanwhile, a soil column 5 for nest building is formed by compacting a soil suitable for building the nest, and the soil column 5 is buried in a covering soil 2 on the back face of the covering plate 1 so that the peripheral surfaces (5c, 5d, 5e) and the rear end face (5b) may come into contact with the covering soil 2, and the front end face 5a opposing to the covering plate 1 of the soil column 5 for nest building is exposed to the opening face on the back face side of the opening 4 for the bird to pass through.;COPYRIGHT: (C)2006,JPO&NCIPI