Chlorostilbon assimilis
Silhouette: Ferran Sayol · PhyloPic
In 3 days ~10%
The garden emerald (Chlorostilbon assimilis) is a small hummingbird in the "emeralds", tribe Trochilini of subfamily Trochilinae. It is found in Costa Rica and Panama. The garden emerald was at one time considered a subspecies of the blue-tailed emerald (Chlorostilbon mellisugus). As its own species, it is monotypic.
The garden emerald is 7.8 to 8.5 cm (3.1 to 3.3 in) long and weighs about 3 to 4.1 g (0.11 to 0.14 oz). The adult male has dark metallic green upperparts with bluish green uppertail coverts. Its forked tail is blue-black and the central feathers have a light bluish green gloss. Its underparts are a brighter metallic green than the upperparts, sometimes with a light blue sheen, and it has white thigh tufts. The adult female has bright metallic green to bronze green upperparts with bluish green uppertail coverts. Its tail is blue-black, with dull metallic green central feathers and pale gray tips on the outer ones. It has dusky cheeks, a white or grayish white spot behind the eye, and pale gray underparts. Juvenile males are like the adult female but darker gray below.
The garden emerald is found... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Chirripó National Park | 🇨🇷 Costa Rica | |
| 2 | Coiba National Park | 🇵🇦 Panama | |
| 3 | Parque Natural Metropolitano | 🇵🇦 Panama | |
| 4 | San Lorenzo Protected Forest | 🇵🇦 Panama | |
| 5 | La Amistad International Park (Panama) | 🇵🇦 Panama | |
| 6 | Volcán Barú National Park | 🇵🇦 Panama | |
| 7 | Chagres National Park | 🇵🇦 Panama | |
| 8 | Piedras Blancas National Park | 🇨🇷 Costa Rica | |
| 9 | Darién National Park | 🇵🇦 Panama | |
| 10 | Soberanía National Park | 🇵🇦 Panama | |
| 11 | Marino Ballena National Park | 🇨🇷 Costa Rica | |
| 12 | Corcovado National Park | 🇨🇷 Costa Rica | |
| 13 | Tapantí-Macizo de la Muerte National Park | 🇨🇷 Costa Rica | |
| 14 | Bastimentos Island National Marine Park | 🇵🇦 Panama |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Panama City | 🇵🇦 Panama |
Rare
Under 5% of wildlife watchers report a Garden Emerald sighting in Piedras Blancas National Park on a given day, based on 41 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 244th most-seen of the 344 birds we can rate there. Over three days the chance rises to about 10%, if each day is a fresh chance.
May
In that month about 10% of wildlife watchers report a Garden Emerald in Piedras Blancas National Park on a given day, against under 5% in June to April, the lowest months.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Garden Emerald 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 14
Of the 14 parks where we can rate Garden Emerald sightings, Piedras Blancas National Park ranks 8th at under 5%. The best odds are in Chirripó National Park (Costa Rica, about 20%), Coiba National Park (Panama, about 10%) and Parque Natural Metropolitano (Panama, about 10%).
Same family: Trochilidae
The closest relatives of the Garden Emerald that you can see in Piedras Blancas National Park (family Trochilidae, Hummingbirds) are Rufous-tailed Hummingbird (about 50%), Charming Hummingbird (about 40%) and Long-billed Hermit (about 40%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Garden Emerald is recorded against all the birds logged in Piedras Blancas National Park (41 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.
