Both male and female macaws look alike, which is uncommon among vividly coloured birds. The cobalt-blue hyacinth macaw (Anodorhynchus hyacinthinus) of Brazil, Bolivia, and Paraguay is the largest of all parrots, measuring 95–100 cm (37.5–39.5 inches) long. The scarlet macaw (Ara macao) is probably the best-known New World parrot. Its brilliant red, yellow, and blue plumage contrasts with a bare white face that may blush when the bird is excited. Flying with distinctive slow wingbeats and their long tails trailing, scarlet macaws are most often seen flying to and from roosting and feeding sites in pairs, family groups, or flocks. These gregariousbirds can often be heard calling in flight, emitting loud metallic screeches.