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Asian Emerald Cuckoo - BirdForum Opus

Photo © by Reini
Doi Inthanon National Park km 38, Northern Thailand, November 2006
Chrysococcyx maculatus


17–18 cm (6¾-7 in)
Adult Male
Iridescent dark green head, upper-parts and upper breast together with white lower breast and belly marked with dark green barring diagnostic. Orbital skin orange; bill orange yellow with dark tip.
Sub-adult Male
Similar to adult male but entire underparts (including throat and breast) marked with white and dark green bars.
Pale coppery green upperparts together with chestnut crown and nape diagnostic. Entire underparts barred.


Photo © by mohbhorn
Rama IX Park, Bangkok, Thailand, January 2009

In flight both sexes show white band on underwing, at base of flight feathers.


The known breeding range extends from the Hamalayas east to Myanmar, northern Thailand and China; south of this range, sporadic occurances in India, Sri Lanka, South-east Asia, the Malay Peninsula and Sumatra fall mainly during the wintering periods and are therefore assumed to be either non-breeding visitors or vagrants due to the lack of evidence of breeding within this range.


This is a monotypic species[1].


Sub-adult female
Photo © by SeeToh
Fort Siloso, Singapore, December 2017

Dense evergreen forests and forest edges and broadleafed secondary forests.


Frequents the canopy and crown of tall trees. Other habits little known.


They forage mostly in the canopy, and will often feeding on aerial prey. Their main diet consists of insects; ants, caterpillars and bugs.


They are brood parasites. Host nests species are Crimson Sunbird and Little Spiderhunter.


Voice a sharp CHWEEK, usualy uttered in flight.


Click on photo for larger image


  1. Clements, J. F., T. S. Schulenberg, M. J. Iliff, D. Roberson, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2017. The eBird/Clements checklist of birds of the world: v2017, with updates to August 2017. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/
  2. BF Member observations
  3. Handbook of the Birds of the World Alive (retrieved Dec 2017)

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