Formicivora grisea
Silhouette: Sheatherius · PhyloPic
In 3 days ~10% in a week ~30%
The southern white-fringed antwren (Formicivora grisea) is an insectivorous bird in subfamily Thamnophilinae of family Thamnophilidae, the "typical antbirds". It is found in Brazil, Colombia, French Guiana, Guyana, Suriname, and Venezuela.
The southern white-fringed antwren was described by the French polymath Georges-Louis Leclerc, Comte de Buffon in his Histoire Naturelle des Oiseaux in 1775 from a specimen collected in Cayenne, French Guiana. The bird was also illustrated in a hand-colored plate engraved by François-Nicolas Martinet in the Planches Enluminées D'Histoire Naturelle which was produced under the supervision of Edme-Louis Daubenton to accompany Buffon's text. Neither the plate caption nor Buffon's description included a scientific name but in 1783 the Dutch naturalist Pieter Boddaert coined the binomial name Turdus griseus in his catalogue of the Planches Enluminées. The southern white-fringed antwren is now placed in the genus Formicivora that was introduced by the English naturalist William Swainson in 1824. The generic name combines the Latin words formica for "ant" and -vorus "eating" from vorare "to devour". The specific epithet grisea... Wikipedia →
| # | Park | Country | Daily sighting probability |
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More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Southern White-fringed Antwren sighting in Fortaleza on a given day, based on 21 verified sightings from GBIF citizen-science data. It is the 89th most-seen of the 129 birds we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
October
In that month about 20% of wildlife watchers report a Southern White-fringed Antwren in Fortaleza on a given day, against under 5% in April–September and November–January, the lowest months. That is one of Fortaleza's driest months, with about 5 mm of rain against 240 mm in April.
Between 7 and 10 am
Across all the parks we cover, that three-hour window holds the most Southern 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.
3rd of 5
Of the 5 cities where we can rate Southern White-fringed Antwren sightings, Fortaleza ranks 3rd at under 5%. The best odds are in São Luís (Brazil, about 20%) and Belém (Brazil, about 10%).
GBIF citizen-science records
It is estimated from how often the Southern White-fringed Antwren is recorded against all the birds logged in Fortaleza (21 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.
