Question

why did the eagle lay her eggs in grief and weep
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Answer 1

Like most birds, eagles develop a brood patch, or bare spot on their belly, to better facilitate heat transfer to the egg during incubation. Both male and female eagles develop a brood patch.

Answer 2

It’s hard to imagine what a mourning bird would look like. But forced to guess, I would say the footage of two female Emperor Penguins huddled around a lifeless chick in BBC’s series “Penguins-Spy in the Huddle” comes uncomfortably close: