Eutoxeres aquila
Silhouette: Emma Hughes · PhyloPic
In 3 days <5% in a week ~10%
The white-tipped sicklebill (Eutoxeres aquila) is a species of hummingbird in the family Trochilidae. It is found in Colombia, Costa Rica, Ecuador, Panama, Peru, and Venezuela. The white-tipped sicklebill shares the genus Eutoxeres with the buff-tailed sicklebill (E. condamini).
The white-tipped sicklebill's most prominent feature is its strongly decurved bill that arcs through a quarter circle; the maxilla is jello and the mandible yellow. The species is about 11.5 to 13.5 cm (4.5 to 5.3 in) long and weighs about 8.6 to 14.5 g (0.30 to 0.51 oz). The sexes are alike in plumage. Adults' upperparts are green, their throat and chest blackish, and the rest of the underparts striped green and white. The tail is mostly green, with the outer pair of feathers more dusky with white tips. Juveniles appear scaly. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Tenorio Volcano National Park | 🇨🇷 Costa Rica | |
| 2 | Braulio Carrillo National Park | 🇨🇷 Costa Rica | |
| 3 | Arenal Volcano National Park | 🇨🇷 Costa Rica | |
| 4 | Podocarpus National Park | 🇪🇨 Ecuador | |
| 5 | Chirripó National Park | 🇨🇷 Costa Rica | |
| 6 | Farallones de Cali National Natural Park | 🇨🇴 Colombia | |
| 7 | Corcovado National Park | 🇨🇷 Costa Rica | |
| 8 | Chagres National Park | 🇵🇦 Panama | |
| 9 | Tapantí-Macizo de la Muerte National Park | 🇨🇷 Costa Rica | |
| 10 | La Amistad International Park (Panama) | 🇵🇦 Panama |
Rare
Under 5% of wildlife watchers report a White-tipped Sicklebill sighting in Arenal Volcano National Park on a given day, based on 155 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 336th 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-tipped Sicklebill in Arenal Volcano National Park on a given day, so our monthly data shows no clear season.
Between 7 and 10 am
Across all the parks we cover, that three-hour window holds the most White-tipped Sicklebill sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 10 parks where we can rate White-tipped Sicklebill sightings, Arenal Volcano National Park ranks 3rd at under 5%, level with the leaders once rounded. The best odds are in Tenorio Volcano National Park (Costa Rica, under 5%) and Braulio Carrillo National Park (Costa Rica, under 5%).
Same family: Trochilidae
The closest relatives of the White-tipped Sicklebill that you can see in Arenal Volcano National Park (family Trochilidae, Hummingbirds) are Rufous-tailed Hummingbird (about 70%), Violet-headed Hummingbird (about 40%) and Scaly-breasted Hummingbird (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the White-tipped Sicklebill is recorded against all the birds logged in Arenal Volcano National Park (155 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.
