Andean Gull illustration
Birdsong field guide

Andean Gull

Chroicocephalus serranus

The Andean Gull is a large, high-altitude gull distinctive for its dark breeding hood and preference for mountain lakes. It is the most common gull found in the interior of the Andes mountains.

What it sounds like

Loud, nasal, and harsh laughing calls, typically rendered as a repeated 'kwa-ha-ha' or 'keer'.

Reference call, compare with what you heard
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Rec. Barry Edmonston · ChileCC BY-NC-SAXeno-canto

Field notes

  • It is the largest member of its genus, Chroicocephalus, reaching up to 48 centimeters in length.
  • Unlike most gulls, it primarily breeds at extreme elevations, typically between 3,000 and 4,500 meters above sea level.
  • It displays a dark coffee-brown to black hood during the breeding season, which fades to a simple dark spot behind the eye in winter.
  • While it nests in the mountains, some populations migrate to the Pacific coast of South America during the non-breeding season.
  • They are highly opportunistic feeders, often seen following agricultural plows to eat exposed invertebrates or scavenging near human settlements.
Habitat
High-altitude freshwater lakes, rivers, marshes, and puna grasslands.
Range
The Andes mountains ranging from southern Colombia to south-central Chile and Argentina.

Similar & commonly confused birds

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