Lake Junín, Peru.
Sometimes treated as conspecific with G. gallinago (with G. delicata) and G. nigripennis; treated as conspecific with G. paraguaiae in HBW, but differs in bright yellow vs dull greenish legs and feet (3); shorter bill, given in one identification guide#R as 62–79 for nominate paraguaiae, 55–79 for other race magellanica, and 47–60 for andina (at least 1); almost entirely white vs half-white, half-brown underwing#R (2); white on outer vane of outermost primary (ns); flush-call “a high-pitched dzeetch”#R vs “a deep, almost rasping, chup or chut-up”#R (at least 2); “wing-winnowing” display sounds also reportedly very different#R. Race innotata, differing from nominate in its clean white underwing-coverts, has been considered possibly a separate species. Two subspecies recognized.
Food and feeding
Status and conservation
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