Have you ever wanted to follow the warblers north on the trail of their fantastic migration? Well, now you can. Just click on a warbler species below to view the latest map from eBird, the wonderful Citizen Science project with over 100 million sightings. Each map defaults to 2015 only, all months, for the United States. Red markers show sightings within the last 30 days. Blue markers show sightings older than 30 days. If too many sightings are encountered, the maps default to purple squares of varying intensity (a map legend will appear on the bottom right of the screen). The maps will show the progress of each species in the United States from the beginning of 2015 onward.
Cape May Warbler
Black-throated Blue Warbler