White-throated Swift illustration
Birdsong field guide

White-throated Swift

Aeronautes saxatalis

The White-throated Swift is a medium-sized, exceptionally fast aerialist distinguished by its striking black-and-white plumage and aerodynamic, sickle-shaped wings.

What it sounds like

A rapid, descending series of shrill, laughing, or chattering twittering notes.

Reference call, compare with what you heard
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Rec. Tero Linjama · United StatesCC BY-NC-SAXeno-canto

Field notes

  • Mating pairs often engage in spectacular aerial copulation, clinging together and tumbling hundreds of feet through the air.
  • They use sticky saliva as a mortar to cement nests of feathers and grasses onto vertical cliff faces and deep rock crevices.
  • During periods of extreme cold or food scarcity, these swifts are capable of entering torpor to significantly reduce their metabolic rate.
  • With a highly streamlined body, they are among the fastest birds in North America, reaching high velocities in level flight.
  • Their legs are so short and specialized for clinging to vertical surfaces that they are physically unable to perch on branches or walk on the ground.
Habitat
Deep canyons, high mountain cliffs, and rocky escarpments, often in arid regions.
Range
Western North America, from southern British Columbia through the western United States and Mexico to Honduras.

Similar & commonly confused birds

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