
Cardellina pusilla
Arenal, Monteverde and Manuel Antonio are the three atlas places where Wilson's Warbler is recorded, with records concentrated in the United States, Canada, Mexico, Costa Rica and Guatemala. The atlas holds about 970,000 records of the bird from eight countries, and the map shows where these sightings concentrate.
Records follow a seasonal pattern. They peak in April and May, then again from August through October, while February remains the month with the fewest records.
Each bar is the share of its 200 month-dated grid cells with records in that month.
These are open occurrence records, so they show where people looked for and recorded the Wilson's Warbler as much as where it lives. The atlas keeps a species' 200 best-recorded grid cells, so the map shows where records concentrate rather than its whole range. Cells are up to 25 km across, and every location is generalised to its cell.
Generalised encounter areas, not exact locations. Each shape is a grid cell coloured by how likely the species is there.
Conservation status not assessed here yet, so every location is generalised to its grid cell.