Nesotriccus ridgwayi
Silhouette: Emily Willoughby · PhyloPic
In 3 days >90%
The Cocos tyrannulet (Nesotriccus ridgwayi), also known as the Cocos flycatcher, is a vulnerable species of bird in subfamily Elaeniinae of family Tyrannidae, the tyrant flycatchers. It is endemic to Cocos Island off Costa Rica.
The Cocos tyrannulet is treated as a monotypic species. However, a study published in 2016 contends that it should be treated as a subspecies of what was then the mouse-colored tyrannulet. That species has since been split into the northern mouse-colored tyrannulet (N. incomtus) and southern mouse-colored tyrannulet (N. murinus).
The Cocos tyrannulet is about 11 cm (4.3 in) long and weighs about 11 g (0.39 oz). The sexes have the same plumage. Adults have a grayish olive to dark brownish olive crown, a slightly paler supercilium and cheeks, and a thin dark line through the eye. Their upperparts are grayish olive to dark brownish olive. Their wings are dusky with dull yellowish buff edges on the flight feathers and tips on the coverts; the latter show as two wing bars. Their tail is dusky. Their throat and underparts are pale yellowish with a brownish to olive wash on the breast. Both sexes have a dark brown iris... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Isla del Coco National Park | 🇨🇷 Costa Rica |
More parks will be added in future updates.
Very likely
About 80% of wildlife watchers report a Cocos Flycatcher sighting in Isla del Coco National Park on a given day, based on 235 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 4th most-seen of the 69 birds we can rate there. Over three days the chance rises to over 90%, if each day is a fresh chance.
March–April, June and December
In those months about 90% of wildlife watchers report a Cocos Flycatcher in Isla del Coco National Park on a given day, against about 50% in February, the lowest month. May and July–August have too few records to rate.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Cocos Flycatcher sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Only Isla del Coco National Park, in our data
Isla del Coco National Park is the only park on Wallace's Line with enough records to rate Cocos Flycatcher sightings: about 80% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Cocos Flycatcher is recorded against all the birds logged in Isla del Coco National Park (235 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.
