Kingfisher

KINGFISHER INTRODUCTION:- Kingfishers argon a group of small to rarity sized giftedly coloured birds in the order Coraciiformes. They accept a cosmopolitan distri justion, with most species cr haveion ground in the Old World and Australia. The group is set either as a single family, Alcedinidae, or as a suborder.Alcedines containing triad families, Alcedinidae (river kingfishers), Halcyonidae (tree kingfishers), and Cerylidae (water kingfishers). There be roughly 90 species of kingfisher. each(prenominal) eat large heads, long, sharp, pointed bills, short legs, and stubby tails. Most species have bright plumagewith little differences between the sexes. Most species are tropical in distribution, and a slight majority are found whole in forests. They consume a wide compass of quarry as well as fish, usually caught by swooping cumulation from a perch. Like new(prenominal) members of their order they draw adjoining in cav ities, usually tunnels dug into the natural or stylize banks in the ground. A few species, principally insular forms, are threatened with extinction. ------------------------------------------------- Taxonomy and evolution The taxonomy of the ternary families is complex and rather controversial. Although unremarkably depute to the order Coraciiformes, from this level down confusion sets in.

The kingfishers were traditionally treated as one family, Alcedinidae with three subfamilies, but quest the 1990s revolution in bird taxonomy, the three agent subfamilies are now often elevated to familial leve l. That transmit was supported by chromosom! e and DNA-DNA hybridisation studies, but challenged on the causa that all three groups are monophyletic with respect to the other Coraciiformes. This leads to them being grouped as the suborder Alcedines. The tree kingfishers have been previously disposed(p) the familial name Dacelonidae but Halcyonidae has priority. The centre of kingfisher diversity is the Australasian region, but the family is not thought to have originated there,...If you want to stupefy a full essay, order it on our website: BestEssayCheap.com

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