
Setophaga fusca
Arenal and Monteverde are the two atlas parks where the Blackburnian Warbler is recorded, with records gathering most thickly in the United States, Canada, Colombia, Ecuador, and Costa Rica. The atlas holds about 521,000 open records of this bird from six countries, and its map follows where they concentrate.
Records are seasonal, peaking in May and September. The months with the fewest records are January, February, March, July, November, and December.
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 Blackburnian 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.