Okay, but why does that bird look so rough?
E39. Every August the questions start: there is a cardinal at the feeder with no head feathers, and it looks terrible. Nothing is wrong with it. It is molting, which every bird does at least every year. Dr. Ryan Terrill of the San Diego Natural History Museum studies what a feather endures over a year and what it takes to replace one, and he makes the case that the few weeks a bird spends looking its worst may be the most consequential weeks it has.
In this episode, you'll hear about:
Why the cardinal at your feeder in late summer looks like it lost a fight
What a bird quietly gives up during…
The skinny
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