Myrmotherula unicolor
Silhouette: Sheatherius · PhyloPic
In 3 days <5%
The unicolored antwren (Myrmotherula unicolor) is a species of bird in subfamily Thamnophilinae of family Thamnophilidae, the "typical antbirds". It is endemic to southeastern Brazil. The unicolored antwren and the Alagoas antwren (M. snowi) were previously considered conspecific and now form a superspecies. The unicolored antwren is monotypic. The unicolored antwren, the Yungas antwren (M. grisea), the Alagoas antwren (M. snowi), and the plain-winged antwren (M. behni) appear to form a monophyletic group with similar vocalizations and habitat requirements.
The unicolored antwren is 9 to 10 cm (3.5 to 3.9 in) long and weighs 6.5 to 8 g (0.23 to 0.28 oz). It is a smallish bird with a short tail. Adult males are almost entirely gray, with lighter underparts than upperparts. Their throat feathers have black bases and gray tips. Adult females have olive-brown upperparts with a grayish tinge on the crown and nape and yellowish brown uppertail coverts. Their wings are dark grayish brown with reddish yellow-brown edges on the flight feathers. Their tail is reddish yellow-brown. Their throat is whitish and their underparts mostly olive-buff... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Serra dos Órgãos National Park | 🇧🇷 Brazil | |
| 2 | Tijuca National Park | 🇧🇷 Brazil |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Rio de Janeiro | 🇧🇷 Brazil |
Rare
Under 5% of wildlife watchers report a Unicolored Antwren sighting in Rio de Janeiro on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 257th most-seen of the 278 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 Unicolored Antwren in Rio de Janeiro 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 Unicolored Antwren sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Rio de Janeiro, in our data
Rio de Janeiro is the only city on Wallace's Line with enough records to rate Unicolored Antwren sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Unicolored Antwren is recorded against all the birds logged in Rio de Janeiro (6 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.
