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"
Siberian thrush above and below, with a white stripe above the eye. The lower belly and flanks are white. The female is a much browner bird, with a buff stripe above the eye. A striking identification feature of both sexes in flight is the black band on the white underwings, a feature shared with the scaly thrush. Siberian thrush The Siberian thrush ("Geokichla sibirica") is a member of the thrush family, Turdidae. The genus name "Geokichla" comes from Ancient Greek "geo-", "ground-" and "kikhle", " thrush". The specific "sibirica" is Latin for Siberia. It breeds in taiga in Siberia. It is strongly