Himantornis haematopus
Silhouette: Sheatherius · PhyloPic
In 3 days ~40% in a week ~70%
The Nkulengu rail (Himantornis haematopus) is a species of bird in the family Rallidae. It belongs to the monotypic genus Himantornis. For long, this singular rail was considered a member of a distinct subfamily Himantornithinae. This was based on the assumption that it was a sort of "living fossil", as it resembles other Gruiformes rather than other rails in many traits. But as it seems, the supposed plesiomorphies are actually atavistic or otherwise re-evolved traits in reaction to its African rainforest habitat. Its closest living relatives seem to be the Asian genera Amaurornis, Gallicrex, Megacrex, and the widespread African Aenigmatolimnas, with Megacrex and Himantornis representing ancient and ecologically quite similar lineages at the extreme ends of the group's distribution. However a later genetic study found that it was basal to the radiation containing Porzana, Tribonyx, Gallinula and Fulica.
It is found in Angola, Cameroon, Central African Republic, Republic of the Congo, Democratic Republic of the Congo, Ivory Coast, Equatorial Guinea, Gabon, Ghana, Guinea, Liberia, Nigeria, Sierra Leone, Togo, and Uganda. It is notoriously difficult to visually observe, preferring to hide, but has a loud and distinctive call often made in pairs.
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Odzala-Kokoua National Park | 🇨🇬 Republic of the Congo | |
| 2 | Chinko Conservation Area | 🇨🇫 Central African Republic | |
| 3 | Taï National Park | 🇨🇮 Ivory Coast | |
| 4 | Semuliki National Park | 🇺🇬 Uganda | |
| 5 | Kakum National Park | 🇬🇭 Ghana |
No species of the same family or order lives in Chinko Conservation Area, so these are its closest relatives here: other birds.
Possible
About 20% of wildlife watchers report a Nkulengu Rail sighting in Chinko Conservation Area on a given day, based on 7 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 22nd most-seen of the 47 birds we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
September
In that month about 40% of wildlife watchers report a Nkulengu Rail in Chinko Conservation Area on a given day, against under 5% in February–March, May, July–August and October, the lowest months. That is one of Chinko Conservation Area's wettest months, with about 160 mm of rain against almost none in January.
Between 5 and 8 am
Across all the parks we cover, that three-hour window holds the most Nkulengu Rail sightings with a recorded time, and about half of them come between 6 am and 6 pm: it is most active around dawn and dusk.
Among the best
Of the 5 parks where we can rate Nkulengu Rail sightings, Chinko Conservation Area ranks 2nd at about 20%, level with the leaders once rounded. The best odds are in Odzala-Kokoua National Park (Republic of the Congo, about 20%).
GBIF citizen-science records
It is estimated from how often the Nkulengu Rail is recorded against all the birds logged in Chinko Conservation Area (7 verified sightings from 2019 to 2026), 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.
