The lilac-breasted roller (Coracias caudatus) is a member of the roller family, Coraciidae, resplendent in a panoply of pastel hues. This African bird is a sight to behold, with its lilac throat and breast, olive crown to mantle, and cheeks of lilac-rufous. The species is further adorned with long, black tail streamers, which juveniles lack. Unofficially, it is considered the national bird of Kenya.
In the field, the lilac-breasted roller is almost unmistakable. Adults boast a lilac throat that deepens into a darker lilac breast, with an olive crown and mantle. The cheeks and ear coverts are a lilac-rufous. Juveniles and immatures can be identified by their lack of tail streamers and a throat and breast of rufous-tawny with broad diffuse buffy-white streaks. The species is not sexually dimorphic, though males may be slightly larger.
The lilac-breasted roller favors open woodland and savanna, typically avoiding treeless expanses. They are often seen perched high, surveying the landscape for prey.
This species is widely distributed across Southern and Eastern Africa and is a vagrant to the southern Arabian Peninsula. It is most abundant in Kenya and can be found from sea level to elevations of 2,000 meters or more.
Lilac-breasted rollers are usually solitary or found in pairs. They are known for their aggressive defense of their nests against raptors and other birds. During the breeding season, males perform acrobatic flights, swooping and diving while emitting harsh cries.
Their diet consists of arthropods and small vertebrates, including insects, spiders, scorpions, and small birds. They hunt from perches, swooping down to catch prey on the ground or in the air.
Lilac-breasted rollers are active during the day and are usually found alone or in pairs. They perch conspicuously at the tops of trees, poles, or other high vantage points from where they can spot insects, lizards, or other prey moving about on the ground. Lilac-breasted rollers hunt from a perch and scout from a higher vantage point (including from atop large herbivorous mammals) before swooping in and grabbing prey with their beaks. If their prey is small, they will swallow it on the ground. These aggressive birds will carry larger prey back to a perch and beat it until it is dismembered. Outside of protected areas such as national parks, Lilac-breasted rollers may often be seen when farmers burn land for agricultural use. Such brush fires stir up insects and other invertebrates, and birds can be seen swooping in for easy prey. In East Africa, they join other perch hunters like Taita fiscals and Pale flycatchers to make opportunistic use of grassland fires. In South Africa, they are also seen in association with kites, storks, swallows, and bee-eaters when the burning of firebreaks drives small animals onto roads. The call of these acrobatic fliers is a harsh, sawing 'rak rak rak' that is given during flight. They also produce loud raucous calls during flight displays and will perch to sing.
Lilac-breasted rollers are monogamous birds believed to mate for life. Pairs nest solitary and are protective of their nest and one of the pair will fly in a rolling pattern as a territorial display against intruders or distract nest predators. During courtship, a Lilac-breasted roller will fly upwards and then tip forward with the wings closed, before flapping to gain speed towards the ground. While leveling out at the highest speed the bird will roll to the left and right a few times, uttering a harsh, raucous 'kaaa, kaarsh', before swooping up again. The display may end with a harsh chuckling. The breeding season occurs at various times of the year, depending on the location; in Somalia, these birds breed from late April to mid-September. They build flat nests of grass in a baobab, dead coconut, casuarina, or Terminalia tree. The nest is situated in a hollowed-out tree cavity some 5 meters (16 ft) off the ground, or even on the side of a termite mound. Lilac-breasted rollers do not create the cavities themselves but take over nest spaces that have been previously hollowed out by woodpeckers or kingfishers. Females lay 2-4 eggs per breeding season and both partners will take turns incubating the eggs for 22 to 24 days. Hatchlings are born altricial (helpless), becoming fully feathered after 18-20 days. They will remain dependent on their parents for up to another month and will be ready to breed at the age of 2 years.
