Bird Guide

Great Lizard Cuckoo vs Mangrove Cuckoo

Great Lizard Cuckoo (Coccyzus merlini)

Great Lizard Cuckoo

Coccyzus merlini

Medium170 gForest

The great lizard cuckoo is the largest species in genus Coccyzus. It is 42 to 54 cm (17 to 21 in) long, about half of which is the tail, and weighs about 100 to 155 g (3.5 to 5.5 oz). Both sexes within each subspecies have the same plumage, but males are larger than females. The species' bill is long and almost straight, with a black or dusky maxilla and a paler mandible. Adults of the nominate subspecies C. m. merlini have an olive-brown crown, nape, and upperparts. Their primaries are rufous, but that color often only shows in flight. Voice: The great lizard cuckoo's principal vocalization is the "Long Call", described as "a throaty ka-ka-ka-ka-ka-ka-kau-kau-ko-ko...with the second part gradually increasing in volume and increasing slightly in the speed of delivery before finally slowing again". It calls at any time of day, but sporadically.

ID text from Wikipedia, CC BY-SA 4.0

Photo: gailhampshire from Cradley, Malvern, U.K · CC BY 2.0
Mangrove Cuckoo (Coccyzus minor)

Mangrove Cuckoo

Coccyzus minor

Medium64 gWoodland

Adults have a long tail, brown above and black-and-white below, and a black curved bill with yellow on the lower mandible. The head and upper parts are brown. There is a yellow ring around the eye. This bird is best distinguished by its black facial mask and buffy underparts. Although the scientific name is minor (meaning "small"), this species is on average the largest of North America's three Coccyzus cuckoos. Adults measure 28–34 cm (11–13 in) in length, weigh 64–102 g (2.3–3.6 oz) and span 38–43 cm (15–17 in) across the wings.

ID text from Wikipedia, CC BY-SA 4.0

Photo: http://www.birdphotos.com · CC BY 3.0

Words used here

nominate:
the first form of the species to be named, which carries the species name twice
upperparts:
the back, wings and top of the tail
primaries:
the outermost flight feathers, out at the wingtip
underparts:
the throat, breast and belly

Where you might meet both

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Photos and recordings are credited to their authors under the licence shown. Full profiles: Great Lizard Cuckoo and Mangrove Cuckoo.