Nyctanassa violacea
Drawn from open occurrence records in and around Great Smoky Mountains 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 April, May, June, July, August, September and October, with the widest coverage in April, May, June, July, August, September and October. 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 Yellow-crowned Night Heron in and around Great Smoky Mountains National Park, and the 1,342 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, Tortuguero and Corcovado are among the five atlas places where the Yellow-crowned Night Heron is recorded. Records concentrate in the United States, Mexico, Costa Rica, Belize and Bermuda, and the map shows where these sightings gather most thickly. The atlas holds about 505,000 open records of this bird from 16 countries.
Of the 5 species with an atlas page recorded in and around Great Smoky Mountains National Park, the Yellow-crowned Night Heron is the 4th most recorded.
The full atlas page, and everywhere else it is recorded