Malachite kingfisher downwards. Fish, aquatic insects, and crustaceans are eaten. Malachite kingfisher The malachite kingfisher ("Corythornis cristatus") is a river kingfisher which is widely distributed in Africa south of the Sahara. It is largely resident except for seasonal climate-related movements. The malachite kingfisher was described by the German naturalist Peter Simon Pallas in 1764 and given the binomial name "Alcedo cristata". The specific epithet "cristata" is from the Latin "cristatus" meaning "crested" or "plumed". The adjective "malachite" in the vernacular name normally refers to the dark green colour of the copper containing mineral. This kingfisher has blue upperparts but has black banding
Mineral or red in hand sample, but has a cherry-red to reddish-brown streak. Streak is more often distinctive for metallic minerals, in contrast to non-metallic minerals whose body colour is created by allochromatic elements. Streak testing is constrained by the hardness of the mineral, as those harder than 7 powder the "streak plate" instead. By definition, minerals have a characteristic atomic arrangement. Weakness in this crystalline structure causes planes of weakness, and the breakage of a mineral along such planes is termed cleavage. The quality of cleavage can be described based on how cleanly and easily the mineral breaks; common descriptors,