Origins and Taxonomy
The previous view that the Megaceryle kingfishers arose in the New World from a specialist fish-eating Alcedinid ancestor which crossed the Bering Strait and gave rise to this genus and the American green kingfishers Chloroceryle, with a large crested species later, in the Pliocene, crossing the Atlantic Ocean to give rise to the Giant and Crested Kingfishers (Fry & Fry, 2000) is probably wrong. Rather, it now seems that the genus probably originates in the Old World, possibly Africa, and the ancestor of the Belted and Ringed Kingfishers made the ocean crossing (Moyle, 2006).
The Megaceryle kingfishers were formerly placed in Ceryle with the Pied Kingfisher, but the latter is genetically closer to the American green kingfishers.
Read more about this topic: Megaceryle
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