Channel -Billed cuckoo
No colour prejudice here !!
This 2 Channel-billed chicks are being reared by a Raven.These huge cuckoos are the largest of all parasitic birds and so has to find large host species with eggs of a similar size ...in this case the raven ,the chicks were already bigger than their carer !
They are a migratory species & breed in Australia in Spring & Summer.