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"
Chestnut-capped thrush Chestnut-capped thrush The chestnut-capped thrush ("Geokichla interpres") lives in forests and woodlands of Southeast Asia. It is a songbird species in the family Turdidae. Traditionally, it has included the Enggano thrush as a subspecies, but a recent review recommended treating them as separate. Consequently, the chestnut-capped thrush is monotypic. The chestnut-capped thrush has a black back and a white belly with black spots. As its common name suggests, it has a chestnut cap. Its face is black with a white mark on the cheeks and another on the lores. The superficially similar chestnut-backed thrush is substantially larger when seen alongside