Breeding Free Range Protection 
10,000 Birds
JULY 22, 2024
Interestingly, the molt of the males takes about 20 days longer than that of the females – the authors speculate that this is because of the different peak time efforts in breeding, with the males being involved earlier (singing, establishing territory) than the females (incubating, nestling care).
10,000 Birds
SEPTEMBER 16, 2014
According to the US Fish and Wildlife Service , there are about 10 billion breeding birds in the US. The maximum population size may be closer to 20 billion in the fall, and 10 billion at the start of the Spring breeding season. I can confirm that other sources I’ve read give similar numbers.
10,000 Birds
JULY 8, 2024
What methods are effective to protect an endangered crane species? One study makes one rather weird and disturbing observation – in China, the number of captive birds has risen faster than can be explained by the breeding of captive birds (more than 1500) alone. Is this relevant?
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