Dysithamnus occidentalis
Silhouette: Sheatherius · PhyloPic
In 3 days <5%
The bicolored antvireo (Dysithamnus occidentalis) is a Near Threatened insectivorous bird in subfamily Thamnophilinae of family Thamnophilidae, the "typical antbirds". It is found in Colombia, Ecuador, and Peru. The bicolored antvireo was described by the American ornithologist Frank Chapman in 1923. He considered it a subspecies of the white-shouldered antshrike (Thamnophilus aethiops) and coined the trinomial name Thamnophilus aethiops occidentalis. By the end of the twentieth century, it was widely accepted as a member of its present genus Dysithamnus.
Confusingly, punctitectus was originally described as a species in genus Dysithamnus while occidentalis was still in genus Thamnophilus. When occidentalis was moved to Dysithamnus and punctitectus was assigned as a subspecies, because occidentalis had been described first (even in a different genus) it became the nominate because of the principle of priority.
The bicolored antvireo is about 13 to 13.5 cm (5.1 to 5.3 in) long. Adult males of the nominate... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Farallones de Cali National Natural Park | 🇨🇴 Colombia |
More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Bicolored Antvireo sighting in Farallones de Cali National Natural Park on a given day, based on 12 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 455th most-seen of the 542 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 Bicolored Antvireo in Farallones de Cali National Natural Park on a given day, so our monthly data shows no clear season.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Bicolored Antvireo 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 Farallones de Cali National Natural Park, in our data
Farallones de Cali National Natural Park is the only park on Wallace's Line with enough records to rate Bicolored Antvireo sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Bicolored Antvireo is recorded against all the birds logged in Farallones de Cali National Natural Park (12 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.
