Song thrush thrush recognizes the cuckoo's non-mimetic eggs. However, the song thrush does not demonstrate the same aggression toward the adult cuckoo that is shown by the blackbird. The introduced birds in New Zealand, where the cuckoo does not occur, have, over the past 130 years, retained the ability to recognise and reject non-mimetic eggs. Adult birds may be killed by cats, little owls and sparrowhawks, and eggs and nestlings are taken by magpies, jays, and, where present, grey squirrels. As with other passerine birds, parasites are common, and include endoparasites, such as the nematode "Splendidofilaria (Avifilaria) mavis" whose specific name "mavis"
Hermit thrush its song indicates that they are related by harmonic simple integer pitch ratios, like most human music and unlike the songs of other birds that have been similarly examined. The hermit thrush is the state bird of Vermont. Walt Whitman construes the hermit thrush as a symbol of the American voice, poetic and otherwise, in his elegy for Abraham Lincoln, "When Lilacs Last in the Dooryard Bloom'd," one of the fundamental texts in the American literary canon. "A Hermit Thrush" is the name of a poem by the American poet Amy Clampitt. A hermit thrush appears in the fifth section