Common ostrich other members of Palaeognathae and thus the flighted tinamous are the sister group to the extinct moa. It is distinctive in its appearance, with a long neck and legs, and can run for a long time at a speed of or even up to about , the fastest land speed of any bird. The common ostrich is the largest living species of bird and lays the largest eggs of any living bird (extinct elephant birds of Madagascar and the giant moa of New Zealand laid larger eggs). The common ostrich's diet consists mainly of plant matter, though it also eats
Yellow-chinned spinetail The tubular entrance tunnel rises almost vertically from the base to the top of the nest. The normal clutch is three, sometimes four, greenish white eggs. This spinetail is parasitised by the striped cuckoo ("Tapera naevia"), which lays one or two eggs in the nest, but it is not known how the cuckoo enters the nest or whether it or its offspring eject the host's young. This widely ranging bird is not considered threatened by the IUCN. Yellow-chinned spinetail The yellow-chinned spinetail ("Certhiaxis cinnamomeus") is a passerine bird found in the tropical New World from Trinidad and Colombia south to