Polytmus theresiae
Silhouette: Ferran Sayol · PhyloPic
In 3 days ~10%
The green-tailed goldenthroat (Polytmus theresiae) is a species of hummingbird in the subfamily Polytminae, the mangoes. It is found in Bolivia, Brazil, Colombia, French Guiana, Guyana, Peru, Suriname, and Venezuela, and possibly Ecuador.
The green-tailed goldenthroat was at one time placed in the monotypic genus Psilomycter, then in Smaragdites which had priority; the latter was later merged into Polytmus. The green-tailed goldenthroat is 8.9 to 9.9 cm (3.5 to 3.9 in) long and weighs 3.0 to 3.9 g (0.11 to 0.14 oz). Both sexes of both subspecies have a long slightly decurved pinkish and black bill. The male of the nominate subspecies is overall shining green. The tail is rounded and green, with all but the central pair of feathers having white at their base. The area around the eye is dusky gray with a white spot behind the eye. The female is smaller. Its throat and breast are whitish thickly spotted with green, and the outermost tail feathers have white tips. Juveniles are like the adult female but with buffy edges to the head's feathers... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Anavilhanas National Park | 🇧🇷 Brazil | |
| 2 | Brownsberg Nature Park | 🇸🇷 Suriname |
Rare
Under 5% of wildlife watchers report a Green-tailed Goldenthroat sighting in Brownsberg Nature Park on a given day, based on 5 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 205th most-seen of the 221 birds we can rate there. Over three days the chance rises to about 10%, if each day is a fresh chance.
February
In that month about 10% of wildlife watchers report a Green-tailed Goldenthroat in Brownsberg Nature Park on a given day, against under 5% in March–April and August–January, the lowest months. May to July have too few records to rate.
Between 7 and 10 am
Across all the parks we cover, that three-hour window holds the most Green-tailed Goldenthroat sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
2nd of 2
Of the 2 parks where we can rate Green-tailed Goldenthroat sightings, Brownsberg Nature Park ranks 2nd at under 5%. The best odds are in Anavilhanas National Park (Brazil, about 10%).
Same family: Trochilidae
The closest relatives of the Green-tailed Goldenthroat that you can see in Brownsberg Nature Park (family Trochilidae, Hummingbirds) are Eastern Long-tailed Hermit (about 60%), Fork-tailed Woodnymph (about 60%) and Straight-billed Hermit (about 50%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Green-tailed Goldenthroat is recorded against all the birds logged in Brownsberg Nature Park (5 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.
