00000nam 2200000za 4500 9.850967 CaOODSP 20241203113642 cr ||||||||||| 180131r19931991onca|||#o f000 0 eng d CaOODSP eng n-cn--- CW69-4/89-1991E-PDF CW66-48/1991E-PDF Nest boxes [electronic resource]. [Rev. 1990] Ottawa : Canadian Wildlife Service, 1993, 1991. [6] p. : ill. Hinterland who's who Digitized edition from print [produced by Environment and Climate Change Canada]. "Reprinted with corrections, 1993"--Colophon. "Text: Based on 1961 pamphlet of same name by William H. Carrick; revised by Judith Kennedy, 1990"--Colophon. Cover title. Issued also in French under title: Nichoirs à oiseaux. "In Canada, about 50 species of birds, ranging in size from wrens to ducks, nest in cavities. Normally, woodpeckers and chickadees excavate these cavities in decayed trees or stumps. These birds make new holes each year, leaving the old ones for other cavity-nesting birds. Natural nest sites disappear as weakened or dying trees are removed from our forests for economic and safety reasons. As a result, there is intense competition for nest holes, with declines occurring in local populations of cavity-nesting species in recent years. By providing nest boxes in appropriate areas, we can help reverse this trend"--p. [2]. gccst Birds gccst Habitats gccst Nature conservation Carrick, William H. Kennedy, Judith, 1961- Canada. Environment Canada. Canadian Wildlife Service. Nichoirs à oiseaux (CaOODSP)9.850972 Hinterland who's who. (CaOODSP)9.504437 PDF 1.76 MB https://publications.gc.ca/collections/collection_2018/eccc/CW69-4-89-1991-eng.pdf