Blackpoll Warbler illustration
Birdsong field guide

Blackpoll Warbler

Setophaga striata

The Blackpoll Warbler is a small songbird famous for its record-breaking transoceanic migration and high-frequency song. It is a boreal specialist that undergoes a dramatic plumage transformation between the breeding and non-breeding seasons.

What it sounds like

A very high, thin, mechanical series of 'tsee' notes delivered on a steady pitch, typically increasing and then fading in volume.

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

Field notes

  • It performs a non-stop transoceanic flight of up to 2,500 km from the Atlantic coast to South America, lasting roughly 72 hours.
  • Prior to migration, individuals nearly double their body mass by storing fat, which serves as the high-energy fuel for their marathon journey.
  • The species possesses one of the highest-pitched songs of any North American wood-warbler, often reaching frequencies difficult for the human ear to detect.
  • While breeding males sport a crisp black cap and white cheeks, they molt into a dull olive-yellow plumage in the fall, making them a classic 'confusing fall warbler'.
  • Morphologically, it has exceptionally long wings relative to its body size, an evolutionary adaptation for sustained long-distance endurance flight.
Habitat
Coniferous boreal forests during the breeding season; tropical lowland evergreen forests and second-growth woodlands during winter.
Range
Breeds from Alaska across northern Canada to Newfoundland; winters primarily in the Amazon Basin and northern South America.

Similar & commonly confused birds

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