Formicivora intermedia
Silhouette: Sheatherius · PhyloPic
In 3 days ~10% in a week ~20%
The northern white-fringed antwren (Formicivora intermedia) is an insectivorous bird in subfamily Thamnophilinae of family Thamnophilidae, the "typical antbirds". It is found in mainland Colombia and Venezuela, on the Pearl Islands of Panama, and on the islands of Tobago and Margarita.
The German ornithologist Jean Cabanis described the northern white-fringed antwren in 1847 and coined its current binomial name Formicivora intermedia. It and what is now the southern white-fringed antwren (F. grisea) were later considered conspecific as the white-fringed antwren, which retained the binomial F. grisea. Worldwide taxonomic systems separated them again based primarily on their very different vocalizations detailed in a 2016 publication, though the Clements taxonomy did not do so until 2023. The North and South American Classification Committees of the American Ornithological Society retain the single white-fringed antwren species, though the South American Committee is seeking a proposal to adopt the split.
The northern white-fringed antwren has these six subspecies: Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Main Ridge Forest Reserve | 🇹🇹 Trinidad and Tobago | |
| 2 | Henri Pittier National Park | 🇻🇪 Venezuela | |
| 3 | Tayrona National Natural Park | 🇨🇴 Colombia |
Rare
Under 5% of wildlife watchers report a Northern White-fringed Antwren sighting in Caracas on a given day, based on 342 verified sightings from GBIF citizen-science data. It is the 107th most-seen of the 295 birds we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
July
In that month about 10% of wildlife watchers report a Northern White-fringed Antwren in Caracas on a given day, against under 5% in August to June, the lowest months. That is one of Caracas's wettest months, with about 100 mm of rain against 15 mm in March.
Between 7 and 10 am
Across all the parks we cover, that three-hour window holds the most Northern White-fringed Antwren sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 2 cities where we can rate Northern White-fringed Antwren sightings, Caracas has the highest daily chance: under 5%. Next come Valencia (Venezuela, under 5%).
GBIF citizen-science records
It is estimated from how often the Northern White-fringed Antwren is recorded against all the birds logged in Caracas (342 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.
