Order Charadriiformes 56 species in 24 genera Size: Between 20 cm (Saunders's Tern, Sternula saundersi) and 79 cm (Great Black-backed Gull, Larus marinus). Distribution: All the continents. The family contents sedentary and migratory species, there's no general pattern. Habitat: Mainly coasts, but they also occupy interior wetlands, even urban areas. Feeding: Varied diet; vegetables, fish, invertebrates. Some species hunt other birds or mammals. Breeding: Vegetal platform on the ground, cliffs or trees. 2-3 eggs. Incubation around 25 days. Nestling period 1-2 weeks. Threat status: 11 threatened species (1 Critically Endangered, 3 Endangered and 7 Vulnerable) [+info]