Gelochelidon nilotica
Drawn from open occurrence records in and around Yala National Park, aggregated onto a 25 km grid. A cell is matched by its centre, which can sit up to 16 km outside the boundary, so this covers the surrounding country too.
Occurrence records measure where people looked and found something, which is not the same as where the animal is. This is a relative likelihood, not a probability.
Records exist for January, February, March, April, June, July, August, September, October, November and December, with the widest coverage in January, February, March, April, June, July, August, September, October, November and December. A quiet month can mean the animal was absent, or that nobody was looking.
A grid cell is a square of the map, not a sighting: 2 squares of 25 km carry records for Gull-billed Tern in and around Yala National Park, and the 2,014 records behind them were collected by other people and published openly. Nothing here counts animals, and a place with more records is not always a place with more animals.
Ngorongoro Conservation Area, Serengeti National Park and Lake Nakuru National Park are among the six atlas places where the Gull-billed Tern is recorded. Its records concentrate most heavily in the United States, India and Spain. The atlas contains about 203,000 records of Gelochelidon nilotica across 36 countries, and the map shows where these sightings concentrate.
Of the 15 species with an atlas page recorded in and around Yala National Park, the Gull-billed Tern is the 7th most recorded.
The full atlas page, and everywhere else it is recorded