
Geothlypis philadelphia
Osa Peninsula, Arenal and Corcovado are the three atlas places where the Mourning Warbler is recorded. Its records concentrate in the United States, Canada, Costa Rica, Colombia and Panama. The atlas holds about 138,000 open records of this bird from six countries, and the map shows where these sightings gather.
Records follow a seasonal pattern. They peak during May and June, while the lowest numbers are recorded from October through April.
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 Mourning 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.