Brush up on warbler identification with this free guide… they have started moving north!

From Cornell Lab of Ornithology:

Warblers are some of our favorite heralds of spring, but they can be notoriously tricky to ID! Pick up our quick, downloadable photo guide featuring eastern, western, and widespread warbler species of the U.S. and Canada so you can compare and contrast female and male warblers in their spring plumage. Have you spotted any warblers yet this spring?