What specific behavioral trait necessitates cormorants often being seen perched with their wings spread wide open?

Answer

They possess less oil in their feathers compared to ducks, requiring frequent drying time.

Cormorants have less oil in their feathers than ducks, which aids diving but means they must frequently spread their wings wide to dry them, often while perched upright near the water's edge.

What specific behavioral trait necessitates cormorants often being seen perched with their wings spread wide open?

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