Hylophilus semicinereus
Silhouette: Sheatherius · PhyloPic
In 3 days ~50% in a week ~80%
The grey-chested greenlet (Hylophilus semicinereus) is a species of bird in the family Vireonidae, the vireos, greenlets, and shrike-babblers. It is found in Bolivia, Brazil, French Guiana, Peru, Venezuela, and possibly Colombia.
The grey-chested greenlet is about 12 cm (4.7 in) long; one individual weighed 13 g (0.46 oz). The sexes have the same plumage. Adults of the nominate subspecies have a grayish green forehead and a grayer crown. Their lores and the sides of their face are buffy and their ear coverts gray-buff. Their upperparts are greenish. Their wings' primaries and secondaries are blackish gray with greenish edges and the tertials are blackish gray with yellow edges on the inner webs. Their tail is dull olive-green with brighter green edges on the feathers. Their chin is whitish gray, their throat dull gray, their breast gray with a greenish yellow-tinge that is brighter on the side, their upper belly dull buff-white, and their lower belly gray... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Anavilhanas National Park | 🇧🇷 Brazil |
More parks will be added in future updates.
Possible
About 20% of wildlife watchers report a Gray-chested Greenlet sighting in Anavilhanas National Park on a given day, based on 75 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 60th most-seen of the 291 birds we can rate there. Over three days the chance rises to about 50%, and over a week to about 80%, if each day is a fresh chance.
May–June and November
In those months about 30% of wildlife watchers report a Gray-chested Greenlet in Anavilhanas National Park on a given day, against about 10% in April, October and December–February, the lowest months.
Between 7 and 10 am
Across all the parks we cover, that three-hour window holds the most Gray-chested Greenlet sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Anavilhanas National Park, in our data
Anavilhanas National Park is the only park on Wallace's Line with enough records to rate Gray-chested Greenlet sightings: about 20% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Gray-chested Greenlet is recorded against all the birds logged in Anavilhanas National Park (75 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.
