Tag: astaxanthin
What About Those Red Waxy Tips On Cedar Waxwing Secondaries?
What are they made of? What’s their purpose? And why do some waxwings have more red waxy tips than others and some individuals don’t have any at all?
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What About Those Red Waxy Tips On Cedar Waxwing Secondaries?
What are they made of? What’s their purpose? And why do some waxwings have more red waxy tips than others and some individuals don’t have any at all?