Cnemarchus erythropygius
Silhouette: Emily Willoughby · PhyloPic
In 3 days <5% in a week ~10%
The red-rumped bush tyrant (Cnemarchus erythropygius) is a species of bird in the family Tyrannidae, the tyrant flycatchers. It is found in Bolivia, Colombia, Ecuador, and Peru. The red-rumped bush tyrant was formally described in 1853 as Taenioptera erythropygia. In 1905 Robert Ridgway erected genus Cnemarchus and transferred erythropygia to it as the type specimen. It was necessary to change the specific epithet's ending to match the masculine gender of the new genus. In the 1970s some authors moved it to genus Myiotheretes; Ridgway had noted the similarity of his new Cnemarchus to that genus. A 1988 paper gave evidence that the species belonged to Cnemarchus and a 2009 study confirmed it.
The red-rumped bush tyrant shares genus Cnemarchus with the rufous-webbed bush tyrant (C. rufipennis). The red-rumped bush tyrant is 20 to 23 cm (7.9 to 9.1 in) long. One female weighed 50 g (1.8 oz). The sexes have the same plumage. Adults of the nominate subspecies have a white forecrown that becomes a hoary gray crown. Their back is dark... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Chingaza National Natural Park | 🇨🇴 Colombia |
More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Red-rumped Bush-Tyrant sighting in Chingaza National Natural Park on a given day, based on 19 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 175th most-seen of the 258 birds we can rate there. Over three days the chance rises to under 5%, and over a week to about 10%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Red-rumped Bush-Tyrant in Chingaza National Natural Park on a given day, so our monthly data shows no clear season.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Red-rumped Bush-Tyrant sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Chingaza National Natural Park, in our data
Chingaza National Natural Park is the only park on Wallace's Line with enough records to rate Red-rumped Bush-Tyrant sightings: under 5% of wildlife watchers there report one on a given day.
Same family: Tyrannidae
The closest relatives of the Red-rumped Bush-Tyrant that you can see in Chingaza National Natural Park (family Tyrannidae, Tyrant Flycatchers) are White-throated Tyrannulet (about 70%), Brown-backed Chat-Tyrant (about 40%) and White-banded Tyrannulet (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Red-rumped Bush-Tyrant is recorded against all the birds logged in Chingaza National Natural Park (19 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.
