File-eared Tree Frog

File-eared Tree Frog

Polypedates otilophus

Silhouette: Jose Carlos Arenas-Monroy · PhyloPic

Least ConcernNear ThreatenedVulnerableEndangeredCritically Endangered
Daily sighting probability ~70% · Very likely
at Danum Valley Conservation Area
141 Verified sightings at Danum Valley Conservation Area From 2019 to 2026
237 Verified sightings across all 4 parks From 2019 to 2026
January Best month highest sighting rate
☀️ Diurnal When it's spotted during daytime hours (6am–6pm)

About the File-eared Tree Frog

Polypedates otilophus (also known as the file-eared tree frog, Borneo eared frog, or bony-headed flying frog) is a species of frog in the family Rhacophoridae. It is endemic to Borneo where it is widespread and found in Brunei, Indonesia, and Malaysia, typically in the lowlands but sometimes as high as 1,100 m (3,600 ft) above sea level. This species has prominent, sharp ridges behind the eye, above the ear, referred to in its names.

Polypedates pseudotilophus from Sumatra and (probably) Java was included in this species until 2014. Males measure up to 80 mm (3.1 in) and females up to 100 mm (3.9 in) in snout–vent length. The body is robust and dorsally lemon yellow in color, with many thin, black stripes; also the thighs have many black bars. The tympanum is conspicuous, with a serrated bony crest above it (the "ear"). Fingertips are expanded into large discs; those on the toes are smaller. The fingers have only rudimentary webbing whereas the toes are moderately webbed. The tadpoles are yellowish green above and white below, acquiring the stripes seen in adults well before metamorphosis. The largest tadpoles are 60 mm (2.4 in) in total length.

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Global Distribution

Warmer areas are where this animal is recorded most often.

Parks Where Found

# Park Country Daily sighting probability
1 Danum Valley Conservation Area 🇲🇾 Malaysia
~70%
2 Kinabalu Park 🇲🇾 Malaysia
~40%
3 Sepilok 🇲🇾 Malaysia
~20%
4 Kinabatangan Wildlife Sanctuary 🇲🇾 Malaysia
~10%

Quick answers

What are the chances of seeing a File-eared Tree Frog in Danum Valley Conservation Area?

About 70% of wildlife watchers report a File-eared Tree Frog sighting in Danum Valley Conservation Area, based on 141 verified sightings from GBIF citizen-science data.

When is the best time to see File-eared Tree Frog in Danum Valley Conservation Area?

January has the highest sighting rate for File-eared Tree Frog in Danum Valley Conservation Area in our monthly data.

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