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"
Eyebrowed thrush Eyebrowed thrush The eyebrowed thrush ("Turdus obscurus") is a member of the thrush family Turdidae. The scientific name comes from Latin "Turdus", "thrush" and "obscurus" "dark". It breeds in dense coniferous forest and taiga eastwards from Siberia. It is strongly migratory, wintering south to China and Southeast Asia. It is a rare vagrant to western Europe. It nests in trees, laying 4-6 eggs in a neat nest. Migrating birds and wintering birds often form small flocks. It is omnivorous, eating a wide range of insects, earthworms and berries. This is an attractive thrush, with a grey back and head, the