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Brush Cuckoo, Cacomantis variolosus by
alabang, on Flickr
The Brush Cuckoo male is grey-brown above, light grey to buff below, with a grey head, neck and breast. The tail has a white tip and is barred white underneath. The female has two colour morphs (forms): unbarred and barred. The unbarred morph is similar to the male but is much paler buff underneath, with faint grey barring across the chest. The barred morph is less common, and has streaked/barred upper parts and the underbody is darkly barred. Juvenile Brush Cuckoos are heavily barred dark brown above and mottled and barred underneath.
Source:
Brush Cuckoo (Cacomantis variolosus) - Birds in Backyards Fact sheet