Arremonops chloronotus
Silhouette: L. Shyamal · PhyloPic
In 3 days ~40% in a week ~70%
The green-backed sparrow (Arremonops chloronotus) is a species of bird in the family Passerellidae, the New World sparrows. It is found in Belize, Guatemala, Honduras, and Mexico. The green-backed sparrow was formally described in 1861 with the binomial Embernagra chloronatus. Eventually it was reassigned to genus Arremonops that Robert Ridgway erected in 1896, and for much of the first half of the twentieth century it was treated as conspecific with A. conirostris, now called the black-striped sparrow.
The green-backed sparrow is 15 to 16 cm (5.9 to 6.3 in) long and weighs 24 to 31 g (0.85 to 1.1 oz). The sexes have the same plumage. Adults of the nominate subspecies have a mostly slate gray head with wide black or brownish black strips on each side of the crown, a black or brownish spot in front of the eye, and a long black or brownish stripe behind the eye. Their upperparts, tail, and wings are bright olive green with canary yellow on the edge of the wings. Their chin and throat are dull white, their breast... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Calakmul Biosphere Reserve | 🇲🇽 Mexico | |
| 2 | Tikal National Park | 🇬🇹 Guatemala | |
| 3 | Sian Ka'an Biosphere Reserve | 🇲🇽 Mexico | |
| 4 | Cockscomb Basin Wildlife Sanctuary | 🇧🇿 Belize | |
| 5 | Montes Azules Biosphere Reserve | 🇲🇽 Mexico | |
| 6 | Cerro Azul Meámbar National Park | 🇭🇳 Honduras | |
| 7 | Biotopo Cerro Cahuí | 🇬🇹 Guatemala | |
| 8 | Lago de Yojoa | 🇭🇳 Honduras | |
| 9 | Cusuco National Park | 🇭🇳 Honduras |
Possible
About 20% of wildlife watchers report a Green-backed Sparrow sighting in Sian Ka'an Biosphere Reserve on a given day, based on 347 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 87th most-seen of the 288 birds we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
January to May
In those months about 20% of wildlife watchers report a Green-backed Sparrow in Sian Ka'an Biosphere Reserve on a given day, against about 10% in June to December, the lowest months. Those are among Sian Ka'an Biosphere Reserve's driest months, with about 50 mm of rain a month against 230 mm in June.
Between 7 and 10 am
Across all the parks we cover, that three-hour window holds the most Green-backed 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.
Among the best
Of the 9 parks where we can rate Green-backed Sparrow sightings, Sian Ka'an Biosphere Reserve ranks 3rd at about 20%, level with the leaders once rounded. The best odds are in Calakmul Biosphere Reserve (Mexico, about 20%) and Tikal National Park (Guatemala, about 20%).
GBIF citizen-science records
It is estimated from how often the Green-backed Sparrow is recorded against all the birds logged in Sian Ka'an Biosphere Reserve (347 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.
