Eupherusa nigriventris
Silhouette: Ferran Sayol · PhyloPic
In 3 days ~80% in a week >90%
The black-bellied hummingbird (Eupherusa nigriventris) is a species of hummingbird in the "emeralds", tribe Trochilini of subfamily Trochilinae. It is found in Costa Rica and Panama. The black-bellied hummingbird is monotypic. It and the stripe-tailed hummingbird (E. eximia) are sister species.
The black-bellied hummingbird is 7 to 8 cm (2.8 to 3.1 in) long and weighs about 3.0 to 3.5 g (0.11 to 0.12 oz). Males have a black breast and belly that provide the species' English name; their forehead and face are also black. The sides of the breast are green and the undertail coverts white. They have mostly bronze green upperparts with narrow black edges on the crown feathers and dull bronze uppertail coverts. Their central tail feathers are dull black with a bronze gloss and the outer ones white. The female has grayish white underparts with white undertail coverts. It has metallic bronze green upperparts that are more bronze on the uppertail coverts. Both sexes molt after breeding but males do so one to two months before the female.
The black-bellied hummingbird is found through Costa Rica into western Panama... Wikipedia →
Call0:15
Costa Rica · 2014
© Andrew Spencer · XC168737 · CC BY-NC-SA 3.0
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Poás Volcano National Park | 🇨🇷 Costa Rica | |
| 2 | Tapantí-Macizo de la Muerte National Park | 🇨🇷 Costa Rica | |
| 3 | Braulio Carrillo National Park | 🇨🇷 Costa Rica | |
| 4 | Volcán Barú National Park | 🇵🇦 Panama | |
| 5 | La Amistad International Park (Panama) | 🇵🇦 Panama |
Likely
About 40% of wildlife watchers report a Black-bellied Hummingbird sighting in Poás Volcano National Park on a given day, based on 1,399 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 20th most-seen of the 356 birds we can rate there. Over three days the chance rises to about 80%, and over a week to over 90%, if each day is a fresh chance.
June–July and November–December
In those months about 60% of wildlife watchers report a Black-bellied Hummingbird in Poás Volcano National Park on a given day, against about 20% in March, the lowest month.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Black-bellied Hummingbird sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 5 parks where we can rate Black-bellied Hummingbird sightings, Poás Volcano National Park has the highest daily chance: about 40%. Next come Tapantí-Macizo de la Muerte National Park (Costa Rica, under 5%) and Braulio Carrillo National Park (Costa Rica, under 5%).
GBIF citizen-science records
It is estimated from how often the Black-bellied Hummingbird is recorded against all the birds logged in Poás Volcano National Park (1,399 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.
