Pygochelidon cyanoleuca
Drawn from open occurrence records in and around Machu Picchu Historic Sanctuary, 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, May, 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: 1 square of 25 km carry records for Blue-and-white Swallow in and around Machu Picchu Historic Sanctuary, and the 5,376 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.
Arenal, Monteverde and Manuel Antonio are the three atlas places where the Blue-and-white Swallow is recorded, with records concentrating in Costa Rica, Brazil, Colombia, Ecuador and Peru. The atlas holds about 555,000 open records of this bird from 12 countries, and the map follows where these records concentrate. Because this species is recorded across both hemispheres, seasons differ by region and each place page shows the months recorded there.
Of the 22 species with an atlas page recorded in and around Machu Picchu Historic Sanctuary, the Blue-and-white Swallow is the 2nd most recorded.
The full atlas page, and everywhere else it is recorded