Each Maine spring, the warblers seem to come in waves.

• The first wave is the the Palm, Pine and Yellow-rumped Warblers.
• Wave two is the Common Yellowthroats, Black-and-White and Yellow Warblers
• The next wave (#3) are the really fun birds: Cape May, Blackburnian, Canada Magnolia and Wilsons
• And finally when you start seeing Blackpoll Warblers . . . wave 4, the final wave is over.

This morning I went to Butler Head in Bath and sure enough . . . Wave two is off and running.