Arremon assimilis
Silhouette: Juan Camilo Cepeda-Duque · PhyloPic
In 3 days <5%
The grey-browed brushfinch (Arremon assimilis) is a species of bird in the family Passerellidae, the New World sparrows. It is found in Colombia, Ecuador, Peru and Venezuela. The grey-browed brushfinch has a complicated taxonomic history. It was formally described in 1840 with the binomial Tanagra (Arrémon, Vieillot; Embernagra, Lesson) assimilis. It was later reassigned to the genus Buarremon that was later merged into genus Atlapetes. Further study resulted in Buarremon's being resurrected. Buarremon assimilis was later reassigned as one of many subspecies of what was then the "stripe-headed brushfinch" (Buarremon torquatus). In 2008 taxonomists began merging Buarremon into Arremon. Following a study published in 2010 and some earlier studies, taxonomists began splitting the "stripe-headed brushfinch" into eight species, one of which was the grey-browed brushfinch.
The grey-browed brushfinch has these four subspecies: Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Los Nevados National Natural Park | 🇨🇴 Colombia | |
| 2 | Chingaza National Natural Park | 🇨🇴 Colombia | |
| 3 | Podocarpus National Park | 🇪🇨 Ecuador | |
| 4 | Farallones de Cali National Natural Park | 🇨🇴 Colombia |
Rare
Under 5% of wildlife watchers report a Gray-browed Brushfinch sighting in Farallones de Cali National Natural Park on a given day, based on 20 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 Gray-browed Brushfinch in Farallones de Cali National Natural Park on a given day, so our monthly data shows no clear season.
Between 7 and 10 am
Across all the parks we cover, that three-hour window holds the most Gray-browed Brushfinch sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
4th of 4
Of the 4 parks where we can rate Gray-browed Brushfinch sightings, Farallones de Cali National Natural Park ranks 4th at under 5%. The best odds are in Los Nevados National Natural Park (Colombia, about 20%), Chingaza National Natural Park (Colombia, under 5%) and Podocarpus National Park (Ecuador, under 5%).
Same genus: Arremon
The closest relatives of the Gray-browed Brushfinch that you can see in Farallones de Cali National Natural Park (genus Arremon, Arremon Brushfinches and Sparrows) are Black-headed Brushfinch (about 30%) and Chestnut-capped Brushfinch (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Gray-browed Brushfinch is recorded against all the birds logged in Farallones de Cali National Natural Park (20 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.
