Among birds, these include herons, hawks, woodpeckers, owls, cuckoos and most passerines. They prey on waterfowl, passerines, and migrating birds. The monarch flycatchers are small to medium-sized insectivorous passerines which hunt by flycatching. Malaria mainly affects passerines (perching birds). Common buzzards may hunt nearly 80 species passerines and nearly all available gamebirds. Gut content and scat analysis show that cats are feeding on small passerines and seabirds. Greater noctule bats feed on nocturnal migrating passerines. Conversely, the substance is relatively innocuous to passerines, wildfowl, and earthworms. The Monarchinae are small to medium-sized insectivorous passerines, many of which hunt by flycatching. They are the perching birds, or the passerines. The passerines (perching birds) alone account for well over 5,000 species. Starlings are small to medium-sized passerines with strong feet. It is classified in the Cotingidae, a family of largely frugivorous tropical forest suboscine passerines. They are nectar feeders and closely resemble other nectar-feeding passerines. This natal dispersal is not sex-biased, unlike in most passerines.