Gull-billed Tern

Gelochelidon nilotica

Gull-billed Tern (Gelochelidon nilotica)
Image: Wikipedia / Wikimedia Commons, CC BY-SA, wikipedia

The gull-billed tern is a tern in the family Laridae. It is widely distributed and breeds in scattered localities in Europe, Asia, northwest Africa, and the Americas. The Australian gull-billed tern was previously considered a subspecies. Source

Where it is now

In the last 8 weeks this bird was recorded 198 times across 8 areas (each area is a 5 degree square).

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Arrival dates

The week it was first heard regularly in each region, after at least six weeks away. Dates differ from south to north, so a region has a range.

RegionFirst arrivalLast arrivalTypical peakAreas
Oceania12 January 202612 January 202617 August 20261

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Figures are effort corrected and come from automatic sound identification, which makes mistakes. How this is measured and how it compares with human observers.