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You are here: Home / Animals / Galapagos Dark Billed Cuckoo

Galapagos Dark Billed Cuckoo

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The Dark-billed Cuckoo is distinguished from other cuckoos by its dark beak, the black mask through its eye and its tuffy under parts. The Dark-billed Cuckoo is found in a variety of habitats from forest edges to riverside thickets. It is a slender, medium sized bird measuring around 26-30 centimetres (10-12 inches) long.

The Dark-billed Cuckoo has a wing-span of approximately 38 – 43 centimetres (15-17 inches), and they weigh 55 – 65 grams (1.94 – 2.29 ounces).

The Dark-billed Cuckoos coloring is that of a dull brown/black, with a whitish underside. It has a long tail with small white spots along the edges. The Dark-billed Cuckoo has less rufous wings than the Yellow-billed Cuckoo.

The Dark-billed Cuckoo has a black beak and a distinguishing red orbital ring around its eye. Its eyes are dark and legs are grey. Male and female are similar in plumage, but females average slightly larger.

Despite its name, the Dark-billed Cuckoos are not brood parasites, however, they rear their young in a nest built by themselves. Brood paratism refers to the practice of one species laying its egg in the nest of another species called the host.

The host can often be much smaller than the offspring it will be feeding. In most cases, the parasitic chick will evict the hosts own eggs from the nest so that it has its hosts undivided attention.

Like the Yellow-billed Cuckoo, the young Dark-billed Cuckoo develops incredibly quickly. The entire period from egg laying to fledgling leaving the nest lasts only 17 days. On day six or seven after hatching, the feathers of the young burst out of their sheaths, allowing the nestling to become fully feathered in two hours.

Both parents build the nest, incubate the eggs and brood the nestlings. Dark-billed Cuckoos incubate and brood equally during the day, but the male takes the night shift. The male brings nest material every time he comes to the nest to take his turn. The female usually takes the offering and works it into the nest.

The infant cuckoo resembles the adult, but with a less distinct tail pattern.

The song of the Dark-billed Cuckoo is a throaty ‘ka, ka, ka, ka, ka, kow, kowp, kowp, kowp, kowp’. The Dark-billed Cuckoo also makes single ‘coos’.

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About Joanne Spencer

I've always been passionate about animals which led me to a career in training and behaviour. As an animal professional I'm committed to improving relationships between people and animals to bring them more happiness.

Animal Classification

Kingdom:Animalia
Phylum:Chordata
Class:Aves
Order:Cuculiformes
Family:Cuculidae
Genus:Coccyzus
Species:C. melacoryphus
Binomial name:Coccyzus melacoryphus

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