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Evolve
@evolve
Hooded mergansers are a striking species of fish-eating duck. The males' breeding plumage (pictured) is particularly beautiful. š· Mark Hamlin
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LilyAnderson
@lilyanderson
They look the same How can we distinguish between males and females?
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Evolve
@evolve
They are both males. Females have far less impressive plumage.
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