Cuckoo-roller
A forest bird of Madagascar and the Comoros, unique in its order.
The cuckoo-roller or courol (Leptosomus discolor) is the only bird in the family Leptosomidae, previously often placed in the order Coraciiformes but now placed in its own order Leptosomiformes. It is at the root of a group containing Trogoniformes, Bucerotiformes, Piciformes, and Coraciiformes, and despite its name does not share close evolutionary origins with cuckoos or rollers.
- scientific_name
- Leptosomus discolor
- family
- Leptosomidae
- order
- Leptosomiformes
- length
- 40–50 cm (16–20 in)
- habitat
- Forests and woodlands in Madagascar and the Comoro Islands
- conservation_status
- Least Concern (IUCN)
- subspecies
- 3 (nominate L. d. discolor, L. d. intermedius, L. d. gracilis)
Lore & Background
The cuckoo-roller is a medium-large bird inhabiting forests and woodlands in Madagascar and the Comoro Islands. Three subspecies are described: the nominate L. d. discolor in Madagascar and Mayotte Island, L. d. intermedius on Anjouan, and L. d. gracilis of Grande Comore. Based on smaller size, plumage differences, and minor voice differences, L. d. gracilis is sometimes considered a separate species, the Comoros cuckoo-roller (L. gracilis). The species is sexually dichromatic: males have a velvety grey chest and head, white underparts, dark iridescent green back and wings with a purplish tinge, and a black crown and eye-stripe. Females are mostly brown with strongly dark-spotted pale underparts. Juveniles generally resemble a dull female, but at least those of L. d. gracilis are sexually dimorphic. The bill is stout, eyes set far back, legs and feet small, and the feet have an unusual structure now thought to be zygodactylous. Its diet includes chameleons, insects (locusts, caterpillars, grasshoppers, cicadas, stick insects), and geckos. It forages by perching motionless and making quick sallies, or hunting from the air. Prey is caught in the large bill and killed by beating against a branch.
Reader's Guide
The cuckoo-roller is significant as the sole member of its family Leptosomidae and its own order Leptosomiformes, occupying a key phylogenetic position at the root of a group containing trogons, hornbills, woodpeckers, and rollers. Its evolutionary distinctiveness, despite its misleading common name, highlights the importance of molecular phylogenetics in revising avian taxonomy. The species is notable for its sexual dichromatism, unusual zygodactylous feet, and a diet that includes chameleons. It is very tame and considered a good omen in Malagasy culture, associated with clear weather and love. The cuckoo-roller is assessed as Least Concern by the IUCN, resistant to habitat change, and persists in small forest fragments across Madagascar, with abundant populations in reserves such as Zahamena, Andringitra, Andohahela, and Marojejy. Its breeding habits remain poorly studied, with nests in natural tree cavities, incubation by the female only, and a clutch size of about four eggs.
Did You Know?
- The cuckoo-roller is the only bird in the family Leptosomidae and is now placed in its own order Leptosomiformes.
- Despite its name, it does not share close evolutionary origins with cuckoos or rollers.
- Males and females have different plumage (sexual dichromatism), unlike true rollers and ground rollers.
- Its feet have an unusual structure now thought to be zygodactylous (two toes forward, two backward).
Frequently Asked Questions
What is a cuckoo-roller?
The cuckoo-roller (Leptosomus discolor) is a small forest bird native to Madagascar and the Comoro Islands. It is the sole member of the family Leptosomidae and the only species in the order Leptosomiformes.
Why does the cuckoo-roller get its own order instead of joining Coraciiformes?
Genetically it sits at the base of a clade that includes trogons, hornbills, piciforms, and coraciiforms, yet it doesn't closely match any one of those groups. Because of that unique basal position, taxonomists now place it in its own order, Leptosomiformes, rather than tucking it into Coraciiformes as older classifications did.
Where can you find a cuckoo-roller in the wild?
It lives in forests and woodlands across Madagascar and the Comoro Islands. Outside that region you won't encounter it in the wild.
How big is a cuckoo-roller?
Adults measure roughly 40 to 50 centimeters (about 16 to 20 inches) in total length. That puts it in the medium-sized forest-bird range, comparable to a small hornbill or a large crow.
Is the cuckoo-roller endangered?
No—the IUCN currently lists it as Least Concern, indicating a stable population across its range in Madagascar and the Comoros. It is not facing the same pressures as many other Madagascan endemics.
More in Miscellaneous Birds 1-24
Elsewhere in the Miscellaneous Birds universe
Spotted an error? Know more?
This is a living reference — every entry is fact-audited, and reader corrections feed straight into our audit queue. Suggest an edit · See this site's audit record