The blue-throated roller (Eurystomus gularis ) is a species of roller in the family Coraciidae. It is native to the African tropical rainforest.
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TerrestrialTerrestrial animals are animals that live predominantly or entirely on land (e.g., cats, ants, snails), as compared with aquatic animals, which liv...
Oviparous animals are female animals that lay their eggs, with little or no other embryonic development within the mother. This is the reproductive...
A territory is a sociographical area that which an animal consistently defends against the conspecific competition (or, occasionally, against anima...
Flocking birds are those that tend to gather to forage or travel collectively. Avian flocks are typically associated with migration. Flocking also ...
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Not a migrantAnimals that do not make seasonal movements and stay in their native home ranges all year round are called not migrants or residents.
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starts withThe blue-throated roller is a dumpy, large-headed, thick-necked bird that frequents the tops of trees. Overall, it is a dark bird, mainly chestnut brown with a bright yellow bill and a blue patch on the throat, a blue tail and purplish blue wings. The juvenile shows bluish on the underparts. It is a rather long-winged roller and can give a falcon like silhouette in flight. It measures 25 cm in length; the males weigh 82–117.5 g, the females 88–108g.
The blue-throated roller occurs in western sub-Saharan Africa from Guinea to Cameroon, south to northern Angola, and west to south-eastern Uganda. It is also found on Bioko Island.
The blue-throated roller tends to remain high up in the tops of trees and hunts above the canopy of primary and secondary rainforest, plantations, gallery forests and relict forest patches in cleared regions. They prefer clearings, riversides and giant emergent trees.
The blue-throated roller perches high up, either singly or in pairs, on bare branches, frequently at the very top of the canopy. They often sit for long periods, and sometimes make their shrill chattering calls. When active they hawk insects in the air and aggressively defend their territory from other bird species. In the late afternoon the birds gather in small flocks, often mixed with broad-billed rollers, to feed on ants and termites which emerge after a rainfall. The rollers feed on these insects in flight, acrobatically chasing them and eating them on the wing. This activity continues until dusk and one roller may eat over 700 insects weighing 40g.
The blue-throated roller is a territorial species when breeding and both courtship and territorial defence involve noisy aerial chases. The nest is an unlined cavity, normally about 10m up the trunk of a tree on the edge of a clearing; 2-3 eggs are laid with laying recorded in February to March in the Ivory Coast, February to April in Ghana, April and September in Nigeria, January in Gabon, and April and October in the Democratic Republic of Congo.