About half of all wood thrush pairs successfully raise two broods. Rappole noticed that primary rainforests were occupied almost exclusively by older wood thrush. In 1948, Shirley Briggs became the first editor of ANS's "Wood Thrush". The wood thrush prefers deciduous and mixed forests for breeding. The wood thrush defends a territory that ranges in size from . Some Icterid birds visit West Virginia, as well as the hermit thrush and wood thrush. The young wood thrush is able to begin breeding the next summer. The wood thrush is the official bird of the District of Columbia. The wood thrush also use a "tut, tut" to signal agitation. The wood thrush ("Hylocichla mustelina") is a North American passerine bird. In spite of this, the wood thrush is considered to be near threatened. The wood thrush is primarily solitary, but occasionally forms mixed-species flocks in the winter. The wood thrush differs in lacking wing bars, a shorter beak, and a different shape. Wood thrush ("Hylocichla mustelina"), and Blue-winged warbler ("Vermivora cyanoptera").