The white-throated kingfisher (Halcyon smyrnensis) also known as the white-breasted kingfisher is a tree kingfisher, widely distributed in Asia from the Sinai east through the Indian subcontinent to the Philippines. This kingfisher is a resident over much of its range, although some populations may make short distance movements. It can often be found well away from water where it feeds on a wide range of prey that includes small reptiles, amphibians, crabs, small rodents and even birds. During the breeding season they call loudly in the mornings from prominent perches including the tops of buildings in urban areas or on wires.
This is a large kingfisher, 27 to 28 cm in length. The adult has a bright blue back, wings and tail. Its head, shoulders, flanks and lower belly are chestnut, and the throat and breast are white. The large bill and legs are bright red. The flight of the white-throated kingfisher is rapid and direct, the short rounded wings whirring. In flight, large white patches are visible on the blue and black wings. Sexes are similar, but juveniles are a duller version of the adult.
The call of this kingfisher is a chuckling chake-ake-ake-ake-ake. They are particularly noisy in the breeding season.
White-throated kingfisher is a common species of a variety of habitats, mostly open country in the plains (but has been seen at 7500 ft in the Himalayas) with trees, wires or other perches. The range of the species is expanding.
The white-throated kingfisher begins breeding at the onset of the Monsoons. Males perch on prominent high posts in their territory and call in the early morning. The tail may be flicked now and in its courtship display the wings are stiffly flicked open for a second or two exposing the white wing mirrors. They also raise their bill high and display the white throat and front. The female in invitation makes a rapid and prolonged kit-kit-kit... call. The nest is a tunnel (50 cm long, but a nest with a 3-foot tunnel has been noted) in an earth bank. The nest building begins with both birds flying into a suitable mud wall until an indentation is made where they can find a perch hold. They subsequently perch and continue digging the nest with their bills. Nest tunnels in a haystack have also been recorded. A single clutch of 4 to 7 round white eggs is typical. The eggs take 20 to 22 days to hatch while the chicks fledge in 19 days.
Birds have sometimes been seen attracted to lights at night, especially during the monsoon season, suggesting that they are partly migratory.