Mortensen's Frog

Mortensen's Frog

Sylvirana mortenseni

Silhouette: Michael Scroggie, from original photograph by John Bettaso, USFWS (original photograph in public domain). · PhyloPic

Daily sighting probability ~30% · Possible
at Khao Yai National Park
59 Verified sightings at Khao Yai National Park From 2019 to 2026
59 Verified sightings across 1 park From 2019 to 2026
September Best month highest sighting rate
☀️ Diurnal When it's spotted during daytime hours (6am–6pm)

About the Mortensen's Frog

Sylvirana mortenseni is a species of true frog. It is found in Cambodia, Laos, and Thailand. The specific name mortenseni honours Ole Theodor Jensen Mortensen, the Danish zoologist who collected the holotype from the island of Koh Chang. Common names Mortensen's frog and Koh Chang Island frog have been proposed for it.

Sylvirana mortenseni has been recorded in evergreen forest on the lower slopes of the mountains, gallery forest, and heavily disturbed areas and forest edge habitats. It has been observed as high as 800 meters above sea level. Clear-cutting of forests is a threat to it, although it appears to also inhabit disturbed areas. Wikipedia →

Global Distribution

Warmer areas are where this animal is recorded most often.

Parks Where Found

# Park Country Daily sighting probability
1 Khao Yai National Park 🇹🇭 Thailand
~30%

More parks will be added in future updates.

Quick answers

What are the chances of seeing a Mortensen's Frog in Khao Yai National Park?

About 30% of wildlife watchers report a Mortensen's Frog sighting in Khao Yai National Park, based on 59 verified sightings from GBIF citizen-science data.

When is the best time to see Mortensen's Frog in Khao Yai National Park?

September has the highest sighting rate for Mortensen's Frog in Khao Yai National Park in our monthly data.

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