This is a list of Bucerotiformes species by global population. While numbers are estimates, they have been made by the experts in their fields. For more information on how these estimates were ascertained, see Wikipedia's articles on population biology and population ecology. This list is incomprehensive, as not all Bucerotiformes have had their numbers quantified. The IOC World Bird List (version 15.1) recognizes 75 species of Bucerotiformes. This list follows IUCN classifications for species names. Where IUCN classifications differ from other ornithological authorities, alternative names are noted. Some species listed as members of Bucerotiformes are extinct:
St. Helena hoopoe (Upupa antaios) - went extinct by end of 17th century.
Species by global population
See also Lists of birds by population Lists of organisms by population
References