HOW does a bird know which of its brood to feed? It just checks how much UV light they reflect. Birds are known to see UV light, but it wasn’t known why. To find out, Jesús Avilés at the Arid Zone ...
While mammals are known for feeding milk to their young, some bird species produce a similar substance called crop milk. Pigeons, doves, and flamingos secrete this nutrient-rich fluid from their crop ...
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