Many birds sing to woo females, but some hummingbirds go to great lengths to do so. They climb to between 5 and 40 metres before plummeting past perched females in death-defying dives. They pull up at ...
There’s more subtlety than humans have realized in dropping out of the sky so fast your tail feathers sing. Male Costa’s hummingbirds in western North America are masters of the tail-screaming ...
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