Bucorvidae
A disputed family of large, ground-dwelling African hornbills.
Bucorvidae is a family of birds that has sometimes been used to classify the ground hornbills of the genus Bucorvus. These large, ground-dwelling birds are endemic to open savanna regions of sub-Saharan Africa and are distinct from other hornbills in their terrestrial habits and carnivorous diet.
- Field
- Ornithology
- Known for
- Ground-dwelling hornbills, sometimes placed in a separate family
- Species
- Two species: Abyssinian ground hornbill and southern ground hornbill
- Distribution
- Open savanna regions of sub-Saharan Africa
- Size
- Adults around a metre tall
Lore & Background
The family Bucorvidae has been proposed to contain the genus Bucorvus, which was introduced in 1830 by French naturalist René Lesson as a subgenus for the Abyssinian ground hornbill. The generic name combines Buceros (the Asian hornbill genus) with corvus, Latin for 'raven.' A molecular phylogenetic study from 2013 found that Bucorvus is sister to all other hornbills, with an estimated divergence in the early Miocene, around 22 million years ago.
The two species in Bucorvus are the Abyssinian ground hornbill, ranging from Senegal east to Ethiopia, and the southern ground hornbill, found in southern and East Africa. Unlike other hornbills, these birds are ground-dwelling and carnivorous, feeding on insects, snakes, other birds, amphibians, and even tortoises.
The classification of ground hornbills as a separate family remains a point of taxonomic uncertainty, with some authorities placing them within the hornbill family Bucerotidae and others recognizing Bucorvidae as distinct.
Reader's Guide
The significance of Bucorvidae lies in its role as a proposed taxonomic family for the ground hornbills, highlighting the evolutionary distinctiveness of these birds. The 2013 molecular study confirmed that Bucorvus is the sister group to all other hornbills, diverging around 22 million years ago in the early Miocene. This deep divergence supports the argument for a separate family, though the classification remains disputed. The ground hornbills' unique ground-dwelling behavior and carnivorous diet further set them apart from their arboreal, mostly frugivorous relatives. Understanding Bucorvidae helps clarify hornbill evolution and the biogeography of African savanna ecosystems. The family's legacy is tied to ongoing debates in avian taxonomy, where molecular data increasingly challenge traditional classifications based on morphology and behavior.
Did You Know?
- A 2013 molecular phylogenetic study found that Bucorvus is sister to all other hornbills.
- Ground hornbills are estimated to have diverged from other hornbills around 22 million years ago.
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