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New Hampshire's ‘State of the Birds' - “Empty Skies: The Decline of Aerial Insectivores”

... used our birdhouses to raise their young, and the cliff Petrochelidon pyrrhonota, who built their jug-like nests under our barn eves. The ... the number of ‘Atlas Blocks' occupied by Cliff Swallows (Petrochelidon pyrrhonota) in Massachusetts dropped from almost 150 in the late ...

Story - Henk Tennekes - 19/03/2012 - 17:19 - 0 comments - 0 attachments

The proverbial clock may well be ticking down on many common species of aerial insectivores in Canada

... Swallow Hirundo rustica, and by over 50% for Cliff Swallow Petrochelidon pyrrhonota, Olive-sided Flycatcher Contopus cooperi, Eastern Wood-Pewee ...

Story - Henk Tennekes - 21/10/2011 - 14:45 - 0 comments - 1 attachment