Rhynchocyclus pacificus
Silhouette: Emily Willoughby · PhyloPic
In 3 days ~10% in a week ~20%
The Pacific flatbill (Rhynchocyclus pacificus) is a species of bird in the family Tyrannidae, the tyrant flycatchers. It is found in Colombia and Ecuador. The Pacific flatbill was originally described in 1914 as Craspedoprion pacificus. It had been known to ornithologists but was believed to be conspecific with what is now the western olivaceous flatbill (Rhynchocyclus aequinoctialis). It was later treated by many authors as a subspecies of the eye-ringed flatbill (R. brevirostris) but by the mid-twentieth century was widely accepted as a full species. By the late twentieth century some taxonomists treated the Pacific and eye-ringed flatbills as a superspecies but later study showed that the Pacific flatbill is basal to all other members of Rhynchocyclus.
The Pacific flatbill is monotypic. The Pacific flatbill is about 15 cm (5.9 in) long and weighs 23.5 to 26.5 g (0.83 to 0.93 oz). The sexes have the same plumage. Adults have a dark olive head with a faint gray eye-ring. Their upperparts are also dark olive. Their wings and tail are dusky brown with wide tawny-buff or ochre edges on the wing coverts. The wings have olive edges on the... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Farallones de Cali National Natural Park | 🇨🇴 Colombia |
More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Pacific Flatbill sighting in Farallones de Cali National Natural Park on a given day, based on 104 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 271st most-seen of the 542 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.
May and June
In those months about 10% of wildlife watchers report a Pacific Flatbill in Farallones de Cali National Natural Park on a given day, against under 5% in July to April, the lowest months.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Pacific Flatbill 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 Farallones de Cali National Natural Park, in our data
Farallones de Cali National Natural Park is the only park on Wallace's Line with enough records to rate Pacific Flatbill sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Pacific Flatbill is recorded against all the birds logged in Farallones de Cali National Natural Park (104 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.
