成鳥 (Northern) © Ryan Schain eBird S18283990 Macaulay Library ML 38265161
成鳥 (Northern) © Ryan Sanderson
成鳥 (Northern) © Daniel Irons
成鳥 (Northern) © Luke Seitz
成鳥 (Northern) © Ryan Schain
+ 6
幼鳥 (Northern) © Evan Lipton
成鳥 (Ridgway's) © Jorge Dangel
成鳥 (Ridgway's) © Tim Avery
成鳥 (Northern) © Simon Best
生息環境 (Northern) © Spencer Follett

キタオビナシショウドウツバメ Stelgidopteryx serripennis

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識別

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Plainest swallow in North America. Plain brown above with indistinct brown wash across throat and breast. Wings are relatively broad; tail is short and square (or slightly notched). Juveniles have rusty wingbars. “Ridgway’s” subspecies, mainly found on the Yucatan peninsula, is larger and lankier, almost recalling a martin. Look for the deeper notch in the tail and dark-tipped undertail coverts. Often seen near water, sometimes in mixed flocks with other swallows. Breeds in holes and crevices, often along riverbanks or under a bridge. Not a colonial nester like Bank Swallow. Call is a low, grating buzz that rises slightly in pitch. Compare with Bank Swallow, which has a contrasting dark chest band. Also very similar to Southern Rough-winged Swallow, which overlaps in Central America. Southern Rough-winged has a brighter tawny throat and paler rump.

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