Hieraaetus wahlbergi
Silhouette: Andy Wilson · PhyloPic
In 3 days ~10% in a week ~20%
Wahlberg's eagle (Hieraaetus wahlbergi) is a bird of prey that is native to sub-Saharan Africa, where it is a seasonal migrant in the woodlands and savannas. It is named after the Swedish naturalist Johan August Wahlberg. Like all eagles, it belongs to the family Accipitridae.
Wahlberg's eagle is a medium-sized raptor, and the sexes are similar. It is about 53–61 cm (21–24 in) in length with a wingspan of 130–146 cm (51–57 in) and a body mass of 437–845 g (15.4–29.8 oz) for males and 670–1,400 g (24–49 oz) for females on average. The head has a small crest, and the legs are yellow. The plumage tone is variable but may be dark brown except for dark-streaked grey undersides to the flight feathers, and a barred grey undertail. Light and dark plumage phases occur. A pale variant may be much lighter brown with whitish, rather than grey undertail and flight feather undersides. The pale variant is much less common than the darker variant.
Wahlberg's eagle is distributed from central Chad to the north-east coast of South Africa. Its western boundary is thought to be Cameroon, although it most commonly occurs further east across the continent... Wikipedia →
Rare
Under 5% of wildlife watchers report a Wahlberg's Eagle sighting in Mombasa on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 137th most-seen of the 146 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
In that month about 20% of wildlife watchers report a Wahlberg's Eagle in Mombasa on a given day, against under 5% in November to September, the lowest months.
Between 7 and 10 am
Across all the parks we cover, that three-hour window holds the most Wahlberg's Eagle sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
4th of 6
Of the 6 cities where we can rate Wahlberg's Eagle sightings, Mombasa ranks 4th at under 5%. The best odds are in Kigali (Rwanda, about 10%), Kampala (Uganda, about 10%) and Addis Ababa (Ethiopia, under 5%).
GBIF citizen-science records
It is estimated from how often the Wahlberg's Eagle is recorded against all the birds logged in Mombasa (6 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.
