: and skulking unless singing late May-mid Jun with an early Jun peak and apparent to late Jun, and but hard to detect mid Aug-late Sep with to early Oct in low tangled vegetation in forest openings and places where migrants concentrate. There are almost annual early Jun records of singing males from the Sieur de Monts area.
Miscellany: Mourning Warbler has not been confirmed breeding but as its spring migration runs into mid June, it's hard to know, absent repeated observation, if a singing bird at that time is a late migrant or a male on territory.
Last Updated: June 4th, 2022