Endangered Species, largely because of exacting requirements for breeding habitat. About 170 breeding males remained in 1987. By 1995 there were 765 breeding males in Michigan, but this number fell to 692 in 1996. Cowbird removal, habitat maintenance, and other protective measures have been successful. Longest incubation of any North America warbler.
Male song is unusually loud.
Male feeds incubating female. Bathes in dew. Habitually wags tail. Winters in Bahama Islands. Numbers greatly reduced.