 The Bucerotidae include about 55 living species, though a number of cryptic species may yet be split, as has been suggested for the red-billed hornbill.Their distribution includes Sub-Saharan Africa and the Indian Subcontinent to the Philippines and the Solomon Islands, but no genus is found in "both" Africa and Asia.Most are arboreal birds, but the large ground hornbills ("Bucorvus"), as their name implies, are terrestrial birds of open savanna.