Polytmus theresiae
Silhouette: Ferran Sayol · PhyloPic
In 3 days ~20% in a week ~40%
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 |
With luck
About 10% of wildlife watchers report a Green-tailed Goldenthroat sighting in Anavilhanas National Park on a given day, based on 23 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 152nd most-seen of the 291 birds we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
August
In that month about 20% of wildlife watchers report a Green-tailed Goldenthroat in Anavilhanas National Park on a given day, against under 5% in September to May, the lowest months. That is one of Anavilhanas National Park's driest months, with about 75 mm of rain against 340 mm in March.
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.
Yes
Of the 2 parks where we can rate Green-tailed Goldenthroat sightings, Anavilhanas National Park has the highest daily chance: about 10%. Next come Brownsberg Nature Park (Suriname, under 5%).
Same family: Trochilidae
The closest relatives of the Green-tailed Goldenthroat that you can see in Anavilhanas National Park (family Trochilidae, Hummingbirds) are Streak-throated Hermit (about 30%), Glittering-throated Emerald (about 10%) and Blue-chinned Sapphire (about 10%), 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 Anavilhanas National Park (23 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.
