The Cuckoo Roller or Courol (Leptosomus discolor)[2] 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.[3] this is one of only two birds – besides the Hoatzin – of which the position is not clear.

It is a medium-large bird, inhabiting forests and woodlands in Madagascar and the Comoro Islands.

The diet of the Cuckoo Roller is not well known, but a 1931 expedition found that chameleons and insects, particularly locusts and caterpillars are important food items. The principal foraging technique is to perch motionless watching for prey, then to make a quick sally towards the prey when observed. They will also forage from the air.