Pied Kingfisher - Behaviour and Ecology

Behaviour and Ecology

This kingfisher feeds mainly on fish, although it will take crustaceans and large aquatic insects such as dragonfly larvae. It usually hunts by hovering over the water to detect prey and diving vertically down bill-first to capture fish. When not foraging, they have a straight rapid flight and have been observed flying at nearly 32 mph. In Lake Victoria in East Africa the introduction of the Nile perch reduced the availability of haplochromine cichlids which were formerly the preferred prey of these birds.

They can deal with prey without returning to a perch, often swallowing small prey in flight, and so can hunt over large water bodies or in estuaries that lack perches that are required by other kingfishers. Unlike some kingfishers, it is quite gregarious, and forms large roosts at night. When perched, the often bob their heads up and down and will sometimes raise their tail and flick it downwards. They call often with sharp chirruk chirruk notes.

The breeding season is February to April. Its nest is a hole excavated in a vertical mud bank about five feet above water. The nest tunnel is 4 to 5 feet deep and ends in a chamber. Several birds may nest in the same vicinity. The usual clutch is 3-6 white eggs. The pied kingfisher sometimes reproduces co-operatively, with young non-breeding birds from an earlier brood assisting parents or even unrelated older birds. In India, nestings have been found to be prone to maggot infestations (probably by Protocalliphora sp.) and in some areas to leeches. Nest holes may sometimes be used for roosting.

This species was initially believed to be descended from an ancestral American green kingfisher which crossed the Atlantic Ocean about 1 million years ago. A more recent suggestion is that the Pied Kingfisher and the American green kingfishers are derived from an Old World species, with the Pied Kingfisher or its ancestor losing the metallic colouration afterwards.

In 1947, H B Cott noticed while skinning birds that hornets were attracted to certain birds but avoided the flesh of Pied Kingfishers. This led to a comparative study of edibility of birds and he suggested that more conspicuously plumaged birds may be less palatable. This suggestion was, however, not supported by a subsequent reanalysis of his data.