Usually the first songsters to be heard in the morning and among the last in the evening, the Wood Thrush’s song pervades the dense forest to establish a few acres of territory. This bird is an excellent songster and can sing “internal duets.” Because of its unique y-shaped voice box, it can harmonized pairs of notes simultaneously. In many songbird species, males challenge their rivals by copying their song; however, the Wood Thrush responds with a different song. (Contests are based not just on performance, but on original content.) The Wood Thrush population is declining due to parasitism from cowbirds, a shrinking habitat, and the depletion of its invertebrate prey caused by acid rain. Wood Thrushes are vulnerable to nest parasitism by Brown-headed Cowbirds, which lay their eggs in other birds’ nests. Unlike other species, the wood thrush accepts these adopted eggs as their own. In many forest edge habitats, virtually every Wood Thrush nest contains at least one cowbird egg. Consequently, the Wood Thrush is listed as a Tri-National Concern Species (Mexico, North America, and Canada) and is on the 2014 state watch list, which lists bird species that are at risk of becoming threatened or endangered without conservation action. This is a digital painting.