Calamonastides gracilirostris
Silhouette: Sheatherius · PhyloPic
In 3 days <5%
The papyrus yellow warbler, papyrus flycatcher-warbler or thin-billed flycatcher-warbler (Calamonastides gracilirostris) is a species of tree warbler; formerly, these were placed in the paraphyletic "Old World warblers". It is monotypic in its genus.
It is found in Burundi, Democratic Republic of the Congo, Kenya, Rwanda, Tanzania, Uganda, and Zambia. Its natural habitat is swamps. It is threatened by habitat loss. Compared with the dull browns and greys typical of swamp-dwelling warblers, this warbler is brightly coloured. It shows an underbelly of rich yellow and olive-brown upper parts. Its song consists of melodious liquid warbling.
BirdLife International 2006. Chloropeta gracilirostris. 2006 IUCN Red List of Threatened Species. Downloaded on 10 July 2007. Fregin, S., M. Haase, U. Olsson, and P. Alström. 2009. Multi-locus phylogeny of the family Acrocephalidae (Aves: Passeriformes) - the traditional taxonomy overthrown. Molecular Phylogenetics and Evolution 52: 866–878.
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| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Bwindi Impenetrable National Park | 🇺🇬 Uganda |
More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Papyrus Yellow-Warbler sighting in Bwindi Impenetrable National Park on a given day, based on 11 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 366th most-seen of the 400 birds we can rate there. Over three days the chance rises to under 5%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Papyrus Yellow-Warbler in Bwindi Impenetrable National Park on a given day, so our monthly data shows no clear season.
Only Bwindi Impenetrable National Park, in our data
Bwindi Impenetrable National Park is the only park on Wallace's Line with enough records to rate Papyrus Yellow-Warbler sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Papyrus Yellow-Warbler is recorded against all the birds logged in Bwindi Impenetrable National Park (11 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.
