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Recent Declines of Sacramento’s Purple Martins Worries Biologists

Sacramento’s remnant population of the Purple Martin Progne subis, a swallow recognized as a state Species of Special Concern, declined ... The Purple Martin (Progne subis) is the largest North American swallow. These aerial acrobats have ...

Story - Henk Tennekes - 05/11/2011 - 07:30 - 0 comments - 0 attachments

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

... every single species of swallows, except the purple martin Progne subis. These included the barn Hirundo Rustica, which nested in our old ...

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

... Eastern Kingbird Tyrannus tyrannus, and Purple Martin Progne subis. Declines have been so severe that Chimney Swift, Common Nighthawk, and ...

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