Arremonops rufivirgatus
Silhouette: L. Shyamal · PhyloPic
In 3 days ~10%
The olive sparrow (Arremonops rufivirgatus) is a species of bird in the family Passerellidae, the New World sparrows. It is found from Texas to Costa Rica. The olive sparrow was formally described in 1851 with the binomial Embernagra rufivigata and the English name "brown striped olive finch". In 1896 Robert Ridgway erected the genus Arremonops and reassigned the olive sparrow to it as the type species.
The olive sparrow's further taxonomy is unsettled. The IOC and AviList assign it these eight subspecies: The other systems include it within the nominate A. r. rufivirgatus. This article follows the eight-subspecies model.
The olive sparrow is about 12 to 14 cm (4.7 to 5.5 in) long and weighs 15 to 30 g... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cañón del Sumidero National Park | 🇲🇽 Mexico | |
| 2 | Cumbres de Monterrey National Park | 🇲🇽 Mexico | |
| 3 | Santa Rosa National Park | 🇨🇷 Costa Rica | |
| 4 | Rincón de la Vieja National Park | 🇨🇷 Costa Rica | |
| 5 | Cabo Blanco Absolute Nature Reserve | 🇨🇷 Costa Rica | |
| 6 | Palo Verde National Park | 🇨🇷 Costa Rica | |
| 7 | Calakmul Biosphere Reserve | 🇲🇽 Mexico | |
| 8 | Ostional Wildlife Refuge | 🇨🇷 Costa Rica | |
| 9 | Carara National Park | 🇨🇷 Costa Rica | |
| 10 | Sian Ka'an Biosphere Reserve | 🇲🇽 Mexico | |
| 11 | Masaya Volcano National Park | 🇳🇮 Nicaragua | |
| 12 | Ría Lagartos Biosphere Reserve | 🇲🇽 Mexico | |
| 13 | Monteverde Cloud Forest Reserve | 🇨🇷 Costa Rica | |
| 14 | Tikal National Park | 🇬🇹 Guatemala | |
| 15 | Tenorio Volcano National Park | 🇨🇷 Costa Rica |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Monterrey | 🇲🇽 México | |
| 2 | San José | 🇨🇷 Costa Rica | |
| 3 | San Antonio | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report an Olive Sparrow sighting in Ostional Wildlife Refuge on a given day, based on 12 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 145th most-seen of the 182 birds we can rate there. Over three days the chance rises to about 10%, if each day is a fresh chance.
November
In that month about 10% of wildlife watchers report an Olive Sparrow in Ostional Wildlife Refuge on a given day, against under 5% in December to October, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Olive Sparrow sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
8th of 15
Of the 15 parks where we can rate Olive Sparrow sightings, Ostional Wildlife Refuge ranks 8th at under 5%. The best odds are in Cañón del Sumidero National Park (Mexico, about 40%), Cumbres de Monterrey National Park (Mexico, about 40%) and Santa Rosa National Park (Costa Rica, about 20%).
GBIF citizen-science records
It is estimated from how often the Olive Sparrow is recorded against all the birds logged in Ostional Wildlife Refuge (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.
