A Spotted Flycatcher (Muscicapa striata) in Spain presumably having a stopover for some food and rest. (IMAGE)

Proceedings of the National Academy of Sciences

A Spotted Flycatcher (Muscicapa striata) in Spain presumably having a stopover for some food and rest.

Caption

A Spotted Flycatcher (Muscicapa striata) in Spain presumably having a stopover for some food and rest.

Credit

Image credit: Birgen Haest

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