Marsh Wren, Cistothorus palustris, singing
Bombay Hook National Wildlife Refuge, DE
Marsh wrens live in marshes with dense reeds. Males build numerous nests on their territory (up to 22), but only 1-3 will be used (depending on how many females the male can attract). Marsh wrens will frequently destroy the eggs of other marsh wrens (as well as those of other species) that are nesting nearby.
(Order Passeriformes, Family Troglodytidae)