Campylorhamphus falcularius
Silhouette: Sheatherius · PhyloPic
In 3 days ~10%
The black-billed scythebill (Campylorhamphus falcularius) is a species of bird in the subfamily Dendrocolaptinae of the ovenbird family Furnariidae. It is native to the Atlantic Forest. The black-billed scythebill and red-billed scythebill (C. trochilirostris) have at times been considered conspecific and also as sister species, but genetic data indicate neither is true.
The black-billed scythebill is monotypic. The black-billed scythebill is 24 to 28 cm (9.4 to 11 in) long and weighs 37 to 42 g (1.3 to 1.5 oz). It is a slim, medium-sized woodcreeper with a very long, slim, dramatically decurved bill. The sexes have the same plumage. Adults have a thinly streaked face of buff and blackish with a narrow buffy-white supercilium. Their neck has the same colored streaks but they are coarser. Their crown and nape are blackish, with thin whitish to ochre streaks that extend onto the upper back. Their back, wing coverts, and rump are brownish to olive-brown. Their wings, uppertail coverts, and tail are rufous-chestnut; the tips of the primaries are blackish brown and the tail feathers have blackish shafts. Their throat is whitish with dark... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Itatiaia National Park | 🇧🇷 Brazil | |
| 2 | Serra dos Órgãos National Park | 🇧🇷 Brazil | |
| 3 | Chapada Diamantina National Park | 🇧🇷 Brazil |
Rare
Under 5% of wildlife watchers report a Black-billed Scythebill sighting in Chapada Diamantina National Park on a given day, based on 12 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 216th most-seen of the 271 birds we can rate there. Over three days the chance rises to about 10%, if each day is a fresh chance.
November
In that month about 10% of wildlife watchers report a Black-billed Scythebill in Chapada Diamantina National Park on a given day, against under 5% in December to October, the lowest months. That is one of Chapada Diamantina National Park's wettest months, with about 180 mm of rain against 50 mm in June.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Black-billed Scythebill 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 3
Of the 3 parks where we can rate Black-billed Scythebill sightings, Chapada Diamantina National Park ranks 3rd at under 5%. The best odds are in Itatiaia National Park (Brazil, about 10%) and Serra dos Órgãos National Park (Brazil, under 5%).
Same family: Furnariidae
The closest relatives of the Black-billed Scythebill that you can see in Chapada Diamantina National Park (family Furnariidae, Ovenbirds and Woodcreepers) are Pale-breasted Spinetail (about 20%), Sooty-fronted Spinetail (about 20%) and Spix's Spinetail (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Black-billed Scythebill is recorded against all the birds logged in Chapada Diamantina National Park (12 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.
