Ancistrops strigilatus
Silhouette: Sheatherius · PhyloPic
In 3 days ~10%
The chestnut-winged hookbill (Ancistrops strigilatus) is a species of bird in the Furnariinae subfamily of the ovenbird family Furnariidae. It is found in Bolivia, Brazil, Colombia, Ecuador, and Peru. The chestnut-winged hookbill is the only member of its genus. Beyond that its taxonomy is unsettled. The International Ornithological Committee and BirdLife International's Handbook of the Birds of the World treat it as monotypic.
Within the ovenbird family, the chestnut-winged hookbill is most closely related to the foliage-gleaners of genus Dendroma. This article follows the monotypic model. The chestnut-winged hookbill is 17 to 19 cm (6.7 to 7.5 in) long and weighs 30 to 39 g (1.1 to 1.4 oz). It is a largish furnariid with distinctive plumage, and a moderately hooked bill resembling those of Thamnophilus antshrikes. The sexes have the same plumage. Adults have a wide whitish to buff supercilium, grizzled brownish and buff lores, brown ear coverts with pale streaks, and yellowish buff malars. Their... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Tambopata National Reserve | 🇵🇪 Peru | |
| 2 | Manu National Park | 🇵🇪 Peru | |
| 3 | Yasuní National Park | 🇪🇨 Ecuador |
Rare
Under 5% of wildlife watchers report a Chestnut-winged Hookbill sighting in Yasuní National Park on a given day, based on 56 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 361st most-seen of the 533 birds we can rate there. Over three days the chance rises 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 Chestnut-winged Hookbill in Yasuní National Park on a given day, so our monthly data shows no clear season.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Chestnut-winged Hookbill sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
3rd of 3
Of the 3 parks where we can rate Chestnut-winged Hookbill sightings, Yasuní National Park ranks 3rd at under 5%. The best odds are in Tambopata National Reserve (Peru, about 10%) and Manu National Park (Peru, under 5%).
Same family: Furnariidae
The closest relatives of the Chestnut-winged Hookbill that you can see in Yasuní National Park (family Furnariidae, Ovenbirds and Woodcreepers) are Buff-throated Woodcreeper (about 30%), Cinnamon-throated Woodcreeper (about 10%) and Striped Woodcreeper (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Chestnut-winged Hookbill is recorded against all the birds logged in Yasuní National Park (56 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.
