Family Hornbills (Bucerotidae)

Least Concern

Jackson's Hornbill (Tockus jacksoni)


French: Calao de Jackson German: Jacksontoko Spanish: Toco de Jackson

Lophoceros jacksoni


, 1891,

Turkwel River, Kenya


Closest to T. flavirostris and T. leucomelas, but close also to T. monteiri and T. erythrorhynchus (and presumably T. damarensis), on basis of similar calls and behaviour, and DNA studies#R. Sometimes considered conspecific with T. deckeni, but differs in its white spotting on wings (3); less yellow on bill tip (line cutting down rather steeply from end of vestigial casque where this is visible, more angled back in deckeni to make bigger area of yellow) (1, possibly 2); smaller size (mean tail of male 206 vs 221, female 178 vs 196#R) (at least 1); has parapatric distribution (3); seemingly different voice#R, described as “louder, more hollow and often slower, each note more distinct”#R. Monotypic.


SE South Sudan, NE Uganda and NW Kenya; regular presence in SW Ethiopia uncertain#R.

Descriptive notes

35 cm; male 165–212 g, female 120–155 g. Small, pied hornbill with white back and wing patches, and white in outer tail feathers. Male with black wings and wing-coverts,... read more


Described as louder, more hollow and often slower, with each note more distinct, than in T.... read more


Open, semi-arid savanna and scattered woodland, especially with Commiphora and thorn trees... read more

Food and feeding

No known differences from T. deckeni.


Season Feb–May. No known differences from T. deckeni (which see). Egg size 34·3–35 mm × 22·4–23·9 mm. Male in captivity lived 11... read more


Sedentary, and no movements reported, but may wander locally during periods of drought.

Status and conservation

Not globally threatened. Widespread and locally common; large populations in several reserves and national parks (e.g. Kidepo Valley National Park, Uganda), and in areas with... read more

Recommended citation

del Hoyo, J., Collar, N. & Kirwan, G.M. (2019). Jackson's Hornbill (Tockus jacksoni). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from on 20 July 2019).