Sylvirana nigrovittata
Silhouette: Michael Scroggie, from original photograph by John Bettaso, USFWS (original photograph in public domain). · PhyloPic
In 3 days ~60% in a week ~90%
Sylvirana nigrovittata, also known as the black-striped frog, black-spotted stream frog, sapgreen stream frog, etc., is a species of frog in the family Ranidae. It is found in northeastern India, Bangladesh, Nepal, southern China, Myanmar, Thailand, Cambodia, Laos, and Vietnam. It has been observed as high as 800 meters above sea level. The species was redelimited in 2018, and earlier literature may refer to other species; identifications from India and Bangladesh are still uncertain.
Sylvirana nigrovittata occurs in gentle streams in evergreen forest, including evergreen galleries in deciduous forest areas. The tadpoles develop quiet stream sections. It is a common species. It is threatened by the loss of forest canopy over streams it inhabits, as well as hydrological changes. It is not considered threatened by the IUCN. Wikipedia →
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Thailand · 2024
© Woraphot Bunkhwamdi · iNaturalist · CC BY-NC 4.0
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Thailand · 2024
© Cheryl Stinchcomb · iNaturalist · CC BY 4.0
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Thailand · 2025
© poom_2 · iNaturalist · CC BY-NC 4.0
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Doi Inthanon National Park | 🇹🇭 Thailand | |
| 2 | Kaeng Krachan National Park | 🇹🇭 Thailand | |
| 3 | Khao Yai National Park | 🇹🇭 Thailand |
Possible
About 20% of wildlife watchers report a Sapgreen stream frog sighting in Doi Inthanon National Park on a given day, based on 20 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 6th most-seen of the 17 amphibians we can rate there. Over three days the chance rises to about 60%, and over a week to about 90%, if each day is a fresh chance.
May
In that month about 40% of wildlife watchers report a Sapgreen stream frog in Doi Inthanon National Park on a given day, against under 5% in April and August–November, the lowest months. That is one of Doi Inthanon National Park's wettest months, with about 290 mm of rain against 20 mm in February.
Between 1 and 4 pm
Across all the parks we cover, that three-hour window holds the most Sapgreen stream frog 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 3 parks where we can rate Sapgreen stream frog sightings, Doi Inthanon National Park has the highest daily chance: about 20%. Next come Kaeng Krachan National Park (Thailand, about 10%) and Khao Yai National Park (Thailand, about 10%).
Same family: Ranidae
The closest relatives of the Sapgreen stream frog that you can see in Doi Inthanon National Park (family Ranidae, Typical Frogs) are Marbled Cascade Frog (about 40%), Doi Inthanon Rock Frog (about 30%) and Green Cascade Frog (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Sapgreen stream frog is recorded against all the amphibians logged in Doi Inthanon National Park (20 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.
