United States backyard birdcount results

This video from the USA is called The Great Backyard Bird Count Portland Maine 2009.

From Wildlife Extra:

US Great Backyard Bird Count results

06/04/2009 22:48:58

Great Backyard Bird Count highlights dynamic changes in where the birds are

April 2009. The 12th annual Great Backyard Bird Count (GBBC) featured an invasion of voracious Pine Siskins … as well shattering last year’s record by submitting more than 93,600 checklists during the four-day event, held from February 16-19. Participants identified 619 species and sent in thousands of stunning bird images for the GBBC photo contest. The Great Backyard Bird Count is organised by the Cornell Lab of Ornithology and the National Audubon Society.

Top 10 most-frequently reported birds in the 2009 GBBC:

1) Northern Cardinal
2) Mourning Dove
3) Dark-eyed Junco [see also here and here]
4) American Goldfinch [see also here and here and here and here]
5) Downy Woodpecker
6) Blue Jay
7) House Finch
8) Tufted Titmouse
9) American Crow
10) Black-capped Chickadee

See also here.

Insect-eating birds that feed on the wing—from nighthawks and nightjars to kingbirds and pewees—are vanishing from parts of North America, and scientists don’t know why: here.

Sibley Guide to Birds [in North America] online: here.

Amazing image of a Kingbird attacking a red tailed hawk 20x its size: here.

ScienceDaily (Mar. 24, 2010) — Two recently diverged populations of a southern California songbird produce unique odors, suggesting smell could contribute to the reproductive isolation that accompanies the origin of new bird species. The Indiana University Bloomington study of organic compounds present in the preen oils of Dark-eyed Juncos is described in this month’s Behavioral Ecology: here.

Dark-eyed junco sex: here.

Thistle flowers could signal to American goldfinches that the seeds the songbirds prize for baby food and parent food will soon be abundant, proposes Thomas Luloff of the University of Western Ontario in London, Canada. And in lab setups, male goldfinches housed among blooming Canadian thistles underwent physiological changes that indicate the birds got the “breed now” message from the combination of summery heat and thrilling thistles, Luloff reported January 6 at the annual meeting of the Society for Integrative and Comparative Biology: here.

By July, most songbirds are in the final stages of raising their young, but not the American Goldfinches. These appealing, colorful birds are just getting started; here.

Related articles

• In Wild Winter, Citizen Scientists See Where and Why Birds Traveled (gloucestercitynews.net)
• Attracting birds to your yard (saukvalleysun.wordpress.com)
• Dark-eyed Junco (juvenile) (scrabble66.typepad.com)
• American Goldfinch (aeoaviary.wordpress.com)
• Wild in the City: European goldfinch makes unexpected visit (thestar.com)
• Don’t Overlook Sparrows! (prairiebirder.wordpress.com)
• Backyard Birds: May 24, 2013 (bethcataldo.com)