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Crag martin

Birds
The crag martins are four species of small passerine birds in the genus Ptyonoprogne of the swallow family. They are the Eurasian crag martin, the pale crag martin, the rock martin and the dusky crag martin. They are closely related to each other,... Wikipedia
Higher classification: Swallows
Scientific name: Ptyonoprogne
Rank: Genus
Lower classifications