Oncostoma olivaceum
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The southern bentbill (Oncostoma olivaceum) is a species of bird in the family Tyrannidae, the tyrant flycatchers. It is found in Colombia and Panama. The southern bentbill was originally described in 1862 as Todirostrum olivaceum. It was later moved to genus Oncostoma that Philip Sclater had created that same year.
The southern bentbill is monotypic. It shares genus Oncostoma with the northern bentbill (O. cinereigulare); in the early twentieth century at least one author considered them to be conspecific. The two form a superspecies.
The southern bentbill is about 9 cm (3.5 in) long and weighs about 6 to 7 g (0.21 to 0.25 oz). It has a distinctive fairly thick downcurved bill. The sexes have the same plumage. Adults have a mostly olive head with a whitish area above the lores. Their back, rump, and uppertail coverts are olive. Their wings are dusky with lemon yellow edges on the flight feathers and greenish yellow tips on the coverts; the latter show as two indistinct wing bars. Their tail is dusky olive. Their throat and breast are yellowish white with olive streaks, their belly yellow, and their flanks olive-yellow with some olive... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Soberanía National Park | 🇵🇦 Panama | |
| 2 | San Lorenzo Protected Forest | 🇵🇦 Panama | |
| 3 | Parque Natural Metropolitano | 🇵🇦 Panama | |
| 4 | Tayrona National Natural Park | 🇨🇴 Colombia | |
| 5 | Darién National Park | 🇵🇦 Panama | |
| 6 | Chagres National Park | 🇵🇦 Panama |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Panama City | 🇵🇦 Panama |
Rare
Under 5% of wildlife watchers report a Southern Bentbill sighting in Panama City on a given day, based on 10 verified sightings from GBIF citizen-science data. It is the 314th most-seen of the 363 birds we can rate there. Over three days the chance rises to under 5%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Southern Bentbill in Panama City 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 Southern 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.
Only Panama City, in our data
Panama City is the only city on Wallace's Line with enough records to rate Southern Bentbill sightings: under 5% of wildlife watchers there report one on a given day.
Same family: Tyrannidae
The closest relatives of the Southern Bentbill that you can see in Panama City (family Tyrannidae, Tyrant Flycatchers) are Tropical Kingbird (about 70%), Common Tody-Flycatcher (about 30%) and Great Kiskadee (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Southern Bentbill is recorded against all the birds logged in Panama City (10 verified sightings), 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.
