Corvus crassirostris
Silhouette: Peileppe · PhyloPic
In 3 days ~10% in a week ~20%
The thick-billed raven (Corvus crassirostris) is a large passerine bird in the family Corvidae. It is endemic to the Horn of Africa, including parts of Ethiopia, Eritrea, Sudan, and Somalia. The thick-billed raven shares with the common raven the distinction of being the world's largest corvid.
The thick-billed raven averages 64 cm (25 in) in length, with a range of 60 to 70 cm (24 to 28 in) and weighs approximately 1.15 kg (2.5 lb) in females and 1.5 kg (3.3 lb) in males on average. Its size is about the same as the largest subspecies of common raven (i.e. those from the Himalayas and Greenland/Canadian Northwest Atlantic) but some common raven subspecies are rather smaller and, going on average weights, the thick-billed raven is likely the heaviest extant passerine. The thick-billed raven is about 25% heavier on average than the Australasian superb lyrebird, which is sometimes erroneously titled the largest passerine.
Its bill is laterally compressed and is deeply curved in profile. This bill, the largest of any passerine at 8–9 cm (3.1–3.5 in) in length, is black with a white tip, with deep nasal grooves and only light nasal bristle covers. This raven has very short... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Bale Mountains National Park | 🇪🇹 Ethiopia |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Addis Ababa | 🇪🇹 Ethiopia |
Rare
Under 5% of wildlife watchers report a Thick-billed Raven sighting in Addis Ababa on a given day, based on 18 verified sightings from GBIF citizen-science data. It is the 72nd most-seen of the 109 birds we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
October and November
In those months about 10% of wildlife watchers report a Thick-billed Raven in Addis Ababa on a given day, against under 5% in December to September, the lowest months. Those are among Addis Ababa's driest months, with about 25 mm of rain a month against 250 mm in August.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Thick-billed Raven sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Addis Ababa, in our data
Addis Ababa is the only city on Wallace's Line with enough records to rate Thick-billed Raven sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Thick-billed Raven is recorded against all the birds logged in Addis Ababa (18 verified sightings), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
