Eupherusa nigriventris
Silhouette: Ferran Sayol · PhyloPic
In 3 days ~10% in a week ~20%
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 |
Rare
Under 5% of wildlife watchers report a Black-bellied Hummingbird sighting in Braulio Carrillo National Park on a given day, based on 105 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 309th most-seen of the 505 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
In that month about 10% of wildlife watchers report a Black-bellied Hummingbird in Braulio Carrillo National Park on a given day, against under 5% in June to April, the lowest months.
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.
3rd of 5
Of the 5 parks where we can rate Black-bellied Hummingbird sightings, Braulio Carrillo National Park ranks 3rd at under 5%. The best odds are in Poás Volcano National Park (Costa Rica, about 40%) and Tapantí-Macizo de la Muerte 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 Braulio Carrillo National Park (105 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.
