Lampornis hemileucus
Silhouette: Ferran Sayol · PhyloPic
In 3 days <5% in a week ~10%
The white-bellied mountaingem or white-bellied mountain-gem (Lampornis hemileucus) is a species of hummingbird in tribe Lampornithini of subfamily Trochilinae. It is found in Costa Rica and Panama. The white-bellied mountaingem is monotypic. There is some evidence that it does not belong in genus Lampornis.
The white-bellied mountaingem is 10 to 11 cm (3.9 to 4.3 in) long. Males weigh about 6.2 g (0.22 oz) and females 5.1 g (0.18 oz). Both sexes have a medium-length black bill, a long white stripe behind the eye, and pinkish feet. Adult males' face and crown are glittering green, much of the rest of the upperparts bronzy green, and the uppertail coverts bronzy. The tail is also bronzy, with dusky gray bands near the end of the outer feathers. The gorget is blue-violet and the rest of the underparts white with green speckles along the sides. Adult females are similar, but the face and crown are less glittering and the throat is white with green speckles. Juveniles of both sexes have rusty fringes on the green feathers; males have a dull bronze gorget.
The white-bellied mountaingem is found on the Caribbean... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Poás Volcano National Park | 🇨🇷 Costa Rica | |
| 2 | La Amistad International Park (Panama) | 🇵🇦 Panama | |
| 3 | Tapantí-Macizo de la Muerte National Park | 🇨🇷 Costa Rica | |
| 4 | Volcán Barú National Park | 🇵🇦 Panama | |
| 5 | Arenal Volcano National Park | 🇨🇷 Costa Rica | |
| 6 | Braulio Carrillo National Park | 🇨🇷 Costa Rica | |
| 7 | Monteverde Cloud Forest Reserve | 🇨🇷 Costa Rica | |
| 8 | Tenorio Volcano National Park | 🇨🇷 Costa Rica |
Rare
Under 5% of wildlife watchers report a White-bellied Mountain-gem sighting in Arenal Volcano National Park on a given day, based on 164 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 333rd most-seen of the 503 birds we can rate there. Over three days the chance rises to under 5%, and over a week to about 10%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a White-bellied Mountain-gem in Arenal Volcano National Park on a given day, so our monthly data shows no clear season.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most White-bellied Mountain-gem sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
5th of 8
Of the 8 parks where we can rate White-bellied Mountain-gem sightings, Arenal Volcano National Park ranks 5th at under 5%. The best odds are in Poás Volcano National Park (Costa Rica, about 20%), La Amistad International Park (Panama) (Panama, under 5%) and Tapantí-Macizo de la Muerte National Park (Costa Rica, under 5%).
GBIF citizen-science records
It is estimated from how often the White-bellied Mountain-gem is recorded against all the birds logged in Arenal Volcano National Park (164 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.
