Breeding Comparison Eggs 
10,000 Birds
MAY 26, 2024
Griffon Vultures have a long breeding season. The chicks need six months to develop so the adults lay their eggs in January. Isn’t it a bit late to breed? Why bother with such a risky journey if you aren’t going to breed? In comparison, over 15 thousand Griffons make the same crossing each season.
10,000 Birds
AUGUST 30, 2020
The juvenile Pied Oystercatcher gives you a glimpse into its development when it stretches a wing out and when it stands close to its parents for size comparison. They prefer to walk away from you to lead you away from eggs, chicks or their territory. We would not expect it to breed for several years yet.
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10,000 Birds
JUNE 2, 2015
Third, observing and photographing breeding birds and their young have become acts of ethical confusion as birders, photographers, and organizational representatives debate the impact of our human presence on the nesting process. And of eggs and nests and birds on nests. Cedar Waxwings exchange berries, carry nesting material, eggs.
10,000 Birds
JULY 17, 2012
Horned Larks breed widely over North America, including up here in the High Arctic. Here they are a common breeding bird, one of our two species that migrate from here to Europe and then south. At the same time (and sometime the same location) we have Semipalmated Plovers breeding, which makes identification a challenge.
10,000 Birds
APRIL 10, 2013
About three billion birds fly north to the Boreal Forest each spring to build nests and lay eggs. About 3 billion of North America’s landbirds, 26 million of its waterfowl, and 7 million of its shorebirds breed here. There are nearly 100 species of which 50% or more of the entire population breeds in the Boreal Forest.
10,000 Birds
JULY 10, 2011
July, as all northern hemisphere birders appreciate, is the month when the egg timer flips and everything starts pouring back out again in a steady stream south. One of Britain’s recent colonisers the Mediterranean Gull begins to arrive in bigger numbers every year as post-breeding dispersal takes hold.
10,000 Birds
SEPTEMBER 4, 2012
The length of each bird species account varies, depending on whether the bird is native or a “visitor” (the book’s term for migrant) or vagrant, breeding or non breeding. They breed in dense colonies, incubate their single egg on the feet, and take more than a year to fledge a chick.
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