Order Anseriformes 159 species in 48 genera Size: Between 30 cm (African Pygmy-goose, Nettapus auritus) and 180 cm (Trumpeter Swan, Cygnus buccinator). Distribution: All the continents. The species of tropical latitudes tend to be sedentary, while the ones of temperate areas are, generally, migratory. Habitat: Fresh and coastal wetlands Feeding: Vegetables, fish, molluscs, crustaceans and insects. Breeding: Generally, accumulations of vegetation on the ground, also in cavities and cliffs. 4-14 eggs. Incubation 21-44 days. Nestling period 28-110 days. Threat status: 28 threatened species (6 Critically Endangered, 10 Endangered and 12 Vulnerable). 6 Extinct [+info]