Blue-throated Macaw

85 cm. Large, blue-and-yellow macaw. Upperparts turquoise-blue, slightly duller on crown and brighter on rump. Underparts largely bright yellow but vent pale blue. Bare facial patch obscured by blue feather-lines merging into blue lower cheek and throat, separated from crown by narrow yellow stripe. Bare pink skin around base of bill. Large bill, long tail, and yellow iris. Sexes similar. Immatures have brown iris with undertail-coverts possibly paler turquoise and broadly edged yellow. Similar spp. Blue-and-yellow Macaw A. ararauna is larger, has a thicker tail, green fore-crown, no pink facial skin, and larger area of facial skin with black throat patch. A. ararauna has dark blue primaries and secondaries contrasting with pale blue coverts, whereas A. glaucogularis has all-dark blue wings. Voice Loud raucous calls when alarmed, but higher-pitched, softer and more nasal than A. ararauna. Typical loud call follows an alternating distinctive pattern. It also has a distinctive rolling introduction to its flight call.

http://www.birdlife.org/datazone/speciesfactsheet.php?id=1548