Birds Breeding Eggs Resources 
10,000 Birds
JUNE 1, 2021
Audubon guides to birds have been around since 1946. The first guide bearing the National Audubon Society imprint was Audubon Bird Guide; Eastern Land Birds , written by Richard Hooper Pough, and illustrated by Don Eckelberry. Plate 28 from Audubon Bird Guide, Eastern Land Birds, by Richard H.
10,000 Birds
OCTOBER 21, 2015
Heermann’s Gulls form large breeding colonies on arid islands in the Gulf of California, Mexico, from March through July. The largest colony exists on Isla Raza, where an estimated 90–95% of the total world population breeds 1. These factors have caused the IUCN to rate this bird as “Near Threatened” 2.
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10,000 Birds
APRIL 10, 2013
All four major flyways in North America — the aerial migration routes traveled by billions of birds each year — converge in one spot in Canada’s boreal forest, the Peace-Athabasca Delta in northeastern Alberta. About three billion birds fly north to the Boreal Forest each spring to build nests and lay eggs. Water withdrawals.
10,000 Birds
AUGUST 13, 2014
More than 99% of the population of Tricolored Blackbirds ( Agelaius tricolor ) live within the state of California and form the largest colonies of any North American passerine bird 1. Therefore the actual numbers of birds killed are grossly underestimated. The California population estimate derived from the Survey was 145,000 birds.
10,000 Birds
JUNE 7, 2015
The Pied Oystercatcher pairs are all in their breeding territories and we can expect to find eggs laid in the first week of July along the coast here. We are looking forward to hopefully seeing some successful Pied Oystercatcher parenting again this breeding season.
10,000 Birds
SEPTEMBER 25, 2013
The threat of extinction of such iconic Florida bird prompted State and Federal agencies to find solutions to stop and reverse the declining trend. Native snails lay 20-50 eggs at a time during the spring. Exotic snails lay 300-500 eggs at a time, lay eggs throughout the year, and are more resistant to environmental changes.
10,000 Birds
JUNE 20, 2012
I know it sounds strange, especially when the folks at Mission San Juan Capistrano are trying to coax them back by playing recordings of the bird’s mating calls. Because I am a local Audubon board member, I was recently contacted by a bird lover who witnessed Cliff Swallow nests being destroyed at the marina where they dock their boat.
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