Animalia > Chordata > Aves > Passeriformes > Corvidae > Corvus > Corvus crassirostris

Corvus crassirostris (Thick-billed Raven)

Wikipedia Abstract

The thick-billed raven (Corvus crassirostris), a corvid from the Horn of Africa, shares with the common raven the distinction of being the largest bird in the corvid family, and indeed the largest of the most diverse bird order, the passerines. The thick-billed raven measures 64 cm (25 in) in length and weighs 1.5 kg (3.3 lb) on average. It has a very large bill that is laterally compressed and is deeply curved in profile giving the bird a very distinctive appearance. This bill is black with a white tip and has deep nasal grooves with only light nasal bristle covers.
View Wikipedia Record: Corvus crassirostris

EDGE Analysis

Uniqueness Scale: Similiar (0) 
 Unique (100)
Uniqueness & Vulnerability Scale: Similiar & Secure (0) 
 Unique & Vulnerable (100)
ED Score: 3.38321
EDGE Score: 1.47778


Adult Weight [1]  2.50 lbs (1.14 kg)
Birth Weight [1]  30.1 grams
Diet [2]  Carnivore (Invertebrates), Carnivore (Vertebrates), Herbivore
Diet - Ectothermic [2]  20 %
Diet - Endothermic [2]  20 %
Diet - Invertibrates [2]  40 %
Diet - Plants [2]  20 %
Forages - Understory [2]  20 %
Forages - Ground [2]  80 %
Clutch Size [3]  4


Name Countries Ecozone Biome Species Report Climate Land
Ethiopian montane forests Ethiopia, Eritrea, Somalia, Sudan Afrotropic Tropical and Subtropical Moist Broadleaf Forests
Ethiopian montane grasslands and woodlands Ethiopia, Eritrea Afrotropic Montane Grasslands and Shrublands
Ethiopian montane moorlands Ethiopia Afrotropic Montane Grasslands and Shrublands

Important Bird Areas

BirdLife Species Factsheet: View Factsheet
Name Location  IBA Criteria   Website   Climate   Land Use 
Ankober: Debre Sina escarpment Ethiopia A1, A2, A3
Awi Zone Ethiopia A1, A3
Bale Mountains National Park Ethiopia A1, A3, A4i
Berga floodplain Ethiopia A1, A3, A4i
Bonga forest Ethiopia A3
Chilimo forest Ethiopia A3
Choke mountains Ethiopia A1, A3
Denkoro forest Ethiopia A3
Entoto Natural Park and escarpment Ethiopia A3
Finchaa and Chomen swamps Ethiopia A1, A3
Guassa (Menz) Ethiopia A1, A3, A4i
Hugumburda and Grat-Kahsu forests Ethiopia A3
Jibat forest Ethiopia A1, A3
Menagesha State Forest Ethiopia A3
Metu: Gore: Tepi forests Ethiopia A1, A3
Mugo highlands Ethiopia A1, A2, A3
Senafe Eritrea A2, A3
Simen Mountains National Park Ethiopia A1, A2, A3
Sululta plain Ethiopia A1, A3, A4i
Tiro Boter: Becho forest Ethiopia A1, A3
Yegof forest Ethiopia A3

Biodiversity Hotspots

Name Location Endemic Species Website
Eastern Afromontane Burundi, Democratic Republic of Congo, Ethiopia, Eritrea, Kenya, Malawi, Mozambique, Rwanda, Saudi Arabia, Tanzania, Uganda, Yemen, Zimbabwe Yes

Range Map



Attributes / relations provided by
1Terje Lislevand, Jordi Figuerola, and Tamás Székely. 2007. Avian body sizes in relation to fecundity, mating system, display behavior, and resource sharing. Ecology 88:1605
2Hamish Wilman, Jonathan Belmaker, Jennifer Simpson, Carolina de la Rosa, Marcelo M. Rivadeneira, and Walter Jetz. 2014. EltonTraits 1.0: Species-level foraging attributes of the world's birds and mammals. Ecology 95:2027
3Jetz W, Sekercioglu CH, Böhning-Gaese K (2008) The Worldwide Variation in Avian Clutch Size across Species and Space PLoS Biol 6(12): e303. doi:10.1371/journal.pbio.0060303
Ecoregions provided by World Wide Fund For Nature (WWF). WildFinder: Online database of species distributions, ver. 01.06 WWF WildFINDER
Biodiversity Hotspots provided by Critical Ecosystem Partnership Fund
Images provided by Google Image Search
Abstract provided by DBpedia licensed under a Creative Commons License
Weather provided by NOAA METAR Data Access