Oncostoma cinereigulare
Silhouette: Emily Willoughby · PhyloPic
In 3 days ~70% in a week ~90%
The northern bentbill (Oncostoma cinereigulare) is a species of bird in the family Tyrannidae, the tyrant flycatchers. It is found in Belize, Colombia, Costa Rica, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, and Panama.
The northern bentbill was originally described in 1857 by Philip Sclater as Todirostrum cinereigulare. Sclater created its current genus Oncostoma in 1862. The northern bentbill is monotypic. It shares genus Oncostoma with the southern bentbill (O. olivaceum); in the early twentieth century at least one author considered them to be conspecific. The two form a superspecies.
The northern bentbill is 9.5 to 10.5 cm (3.7 to 4.1 in) long and weighs about 4.5 to 7 g (0.16 to 0.25 oz). It has a distinctive fairly thick downcurved bill. The sexes have the same plumage. Adults have a mostly pale gray head whose crown is slightly darker. Their back, rump, and uppertail coverts are olive. Their wings are dusky with lemon yellow edges on the flight feathers and tips on the coverts; the latter show as two wing bars. Their tail is dusky. Their throat and breast are pale gray with olive streaks and their belly pale lemon-yellow... Wikipedia →
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | San Pedro Sula | 🇭🇳 Honduras |
Possible
About 30% of wildlife watchers report a Northern Bentbill sighting in Calakmul Biosphere Reserve on a given day, based on 244 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 36th most-seen of the 271 birds we can rate there. Over three days the chance rises to about 70%, and over a week to about 90%, if each day is a fresh chance.
July
In that month about 60% of wildlife watchers report a Northern Bentbill in Calakmul Biosphere Reserve on a given day, against about 20% in March, May and November, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Northern Bentbill sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
2nd of 29
Of the 29 parks where we can rate Northern Bentbill sightings, Calakmul Biosphere Reserve ranks 2nd at about 30%. The best odds are in Cockscomb Basin Wildlife Sanctuary (Belize, about 40%).
Same family: Tyrannidae
The closest relatives of the Northern Bentbill that you can see in Calakmul Biosphere Reserve (family Tyrannidae, Tyrant Flycatchers) are Social Flycatcher (about 50%), Great Crested Flycatcher (about 40%) and Yellow-olive Flycatcher (about 40%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Northern Bentbill is recorded against all the birds logged in Calakmul Biosphere Reserve (244 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.
