The Mallard (Anas platyrhynchos) inhabits from Alaska and north Canada to south USA in breeding season, and from south to central Mexico, and rarely to Panama in winters. This bird is little known in Costa Rica and lives on freshwater ponds and marshes. Matures are 61 cm (24 inches) in height and 1.1 Kg in weight.
Its head is glossy green and separated from chestnut breast by narrow white ring. Body mostly pale-gray, and bill yellow. They feed on small aquatic invertebrates.