Zimmerius cinereicapilla
Silhouette: Emily Willoughby · PhyloPic
In 3 days <5%
The red-billed tyrannulet (Zimmerius cinereicapilla) is a species of bird in the family Tyrannidae, the tyrant flycatchers. It is found in Bolivia, Ecuador, and Peru. The red-billed tyrannulet was originally described as Phyllomyias cinereicapilla. During much of the twentieth century the red-billed tyrannulet and several other tyrannulets were placed in genus Tyranniscus but a study published in 1977 erected the present genus Zimmerius for them. Early in the twentieth century some taxonomists treated it as a subspecies of the slender-footed tyrannulet (Z. gracilipes) but it has been widely accepted as a species since the 1990s. The two are now known to not be closely related, and the red-billed and Mishana tyrannulet (Z. vaillarejoi) appear to be sister species.
The red-billed tyrannulet is monotypic. The red-billed tyrannulet is 11.5 to 12 cm (4.5 to 4.7 in) long; four males weighed 11.3 to 13.8 g (0.40 to 0.49 oz) and two females 10.7 and 11.2 g (0.38 and 0.40 oz). The sexes have the same plumage. Adults have a pale gray or dusky olive crown. Their face, back, and rump are olive green. Their wing's lesser coverts are dusky with olive... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Manu National Park | 🇵🇪 Peru |
More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Red-billed Tyrannulet sighting in Manu National Park on a given day, based on 20 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 538th most-seen of the 641 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 Red-billed Tyrannulet in Manu National Park on a given day, so our monthly data shows no clear season.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Red-billed Tyrannulet sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Only Manu National Park, in our data
Manu National Park is the only park on Wallace's Line with enough records to rate Red-billed Tyrannulet sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Red-billed Tyrannulet is recorded against all the birds logged in Manu National Park (20 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.
