Chaetocercus mulsant
Silhouette: Ferran Sayol · PhyloPic
In 3 days <5% in a week ~10%
The white-bellied woodstar (Chaetocercus mulsant) is a species of hummingbird in tribe Mellisugini of subfamily Trochilinae, the "bee hummingbirds". It is found in Bolivia, Colombia, Ecuador, and Peru. The white-bellied woodstar and several other species in genus Chaetocercus were formerly placed in genus Acestrura but have been in their current position since the late 20th century. The species is monotypic.
The white-bellied woodstar is about 8.5 cm (3.3 in) long and weighs about 3.8 to 4 g (0.13 to 0.14 oz). Both sexes have a straightish black bill. The male's upperparts are dark bluish green which continues onto the flanks. A downcurving white line behind the eye meets the white upper breast. Its gorget is iridescent reddish violet. The belly is white as are patches on the flanks. The forked tail is bluish green and its outermost feathers are shafts with no vanes. The female is bronzy green above. It has a grayish "mask" and a buff stripe behind the eye. Its throat is pale cinnamon, the belly white, and the flanks tawny. Its tail is rounded; the central feathers are green and the others cinnamon with a wide black band near the end... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Los Nevados National Natural Park | 🇨🇴 Colombia | |
| 2 | Chingaza National Natural Park | 🇨🇴 Colombia | |
| 3 | Podocarpus National Park | 🇪🇨 Ecuador | |
| 4 | Farallones de Cali National Natural Park | 🇨🇴 Colombia | |
| 5 | Manu National Park | 🇵🇪 Peru |
Rare
Under 5% of wildlife watchers report a White-bellied Woodstar sighting in Farallones de Cali National Natural Park on a given day, based on 46 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 338th most-seen of the 542 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 Woodstar in Farallones de Cali National Natural Park on a given day, so our monthly data shows no clear season.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most White-bellied Woodstar sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
4th of 5
Of the 5 parks where we can rate White-bellied Woodstar sightings, Farallones de Cali National Natural Park ranks 4th at under 5%. The best odds are in Los Nevados National Natural Park (Colombia, about 10%), Chingaza National Natural Park (Colombia, under 5%) and Podocarpus National Park (Ecuador, under 5%).
Same family: Trochilidae
The closest relatives of the White-bellied Woodstar that you can see in Farallones de Cali National Natural Park (family Trochilidae, Hummingbirds) are Violet-crowned Woodnymph (about 70%), White-necked Jacobin (about 60%) and Brown Violetear (about 60%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the White-bellied Woodstar is recorded against all the birds logged in Farallones de Cali National Natural Park (46 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.
