The Cuckoo Roller or Courol (Leptosomus discolor) is the only bird in the family Leptosomatidae, which is usually considered to be within the order Coraciiformes, which also includes the kingfishers, bee-eaters and rollers. However, the position of this family is not very clear. Morphological evidence may suggest a placement within or near to Falconiformes. In the rather comprehensive DNA study by Hackett et al. this is one of only two birds – besides the Hoatzin – of which the position is not clear, although it seems to be at the root of a group that contains the Trogoniformes, Bucerotiformes, Piciformes and Coraciiformes.
It is a medium-large bird, inhabiting forests and woodlands in Madagascar and the Comoro Islands. There are three subspecies; the nominate L. d. discolor is found in Madagascar and Mayotte Island, L. d. intermedius on Anjouan, and L. d. gracilis of Grand Comoro. Based on its smaller size, differences in the plumage, and minor difference in the voice, the last of these is sometimes considered a separate species, the Comoro Cuckoo Roller (L. gracilis).
Read more about Cuckoo Roller: Description, Distribution and Habitat, Behaviour and Ecology, Relations With Humans, Status
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