The Future of Birds
By Wm. Mueller - - Ornithology, ecology, environmentalism, and our life in the natural world
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Monday, July 2, 2012
aerial insectivore populations trends
Ph. by D. Berganza; Wikim. Commons
Read a fine paper from Bird Studies Canada on aerial insectivores at
this link
. Just a short section from one table shows the following trends:
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