What post-hunt behavior are cormorants famous for, which is necessary because their feathers are not completely waterproof?

Answer

Sunbathing posture with wings fully spread out to dry their feathers

Cormorants are famous for their 'sunbathing' posture; they often perch with their wings fully spread out in an attempt to dry their feathers because their feathers are not completely waterproof.

What post-hunt behavior are cormorants famous for, which is necessary because their feathers are not completely waterproof?
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