AmphibiaWeb - Hyla orientalis


(Translations may not be accurate.)

Hyla orientalis Bedriaga, 1890
Eastern Tree Frog, Oriental Tree Frog
Subgenus: Hyla
family: Hylidae
subfamily: Hylinae
genus: Hyla
Species Description: Bedriaga J von. 1890 "1889". Die Lurchfauna Europa’s. I. Anura. Froschlurche. Bulletin de la Société Impériale des Naturalistes de Moscou. 3:466–622.
Taxonomic Notes: Removed from the synonymy of Hyla arborea by Stoeck et al 2008 Mol. Phyl. Evol. 49. based on their molecular phylogenetic analysis. A note on generic placement: Duellman et al. (Zootaxa 2016) treated two major clades as genera; AmphibiaWeb treats these two clades as subgenera (Hyla in the Old World; Dryophytes in the New World and East Asia), thus stabilizing traditional taxonomy.
Hyla orientalis
© 2019 Omid Mozaffari (1 of 22)

sound file   hear call (1772.1K MP3 file)
sound file   hear call (2974.1K MP3 file)

[call details here]

Conservation Status (definitions)
IUCN Red List Status Account
National Status None
Regional Status None


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amphibiandisease logo View Bd and Bsal data (3 records).

Distribution and Habitat

Country distribution from AmphibiaWeb's database: Armenia, Azerbaijan, Belarus, Bulgaria, Georgia, Greece, Iran, Islamic Republic of, Latvia, Moldova, Republic of, Poland, Romania, Russian Federation, Serbia, Turkey, Ukraine

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View distribution map in BerkeleyMapper.
amphibiandisease logo View Bd and Bsal data (3 records).
The range of Hyla orientalis almost completely circumnavigates the Black Sea (and possibly does) throughout Turkey, northwest through Bulgaria and eastern Romania and north through Ukraine, Poland and as far as Lithuania; to the east, it ranges across the Caucasus Range to the Caspian Sea and northern Iran (Stoeck et al 2008).

This species was featured in news of the week October 10, 2022.

In 1986, the Chernobyl (or alternatively spelled ‘Chornobyl’) nuclear accident in northern Ukraine released unprecedented amounts of radioactive material into the environment. Within the Chernobyl Exclusion Zone, Burrac and Orizaola (2022) surveyed the Eastern Tree Frog (Hyla orientalis) and found increased melanism compared with frogs just outside the Exclusion Zone. It is known that the dark melanin-based pigments could protect fungi against ionizing radiation but a protective role in melanism for vertebrates remains debated because of potentially high physiological costs associated with melanism. Burrac and Orizaola found no physiological costs associated with the maintenance of dark skin coloration in terms of frog body condition or oxidative status. Furthermore no short-term changes in coloration were detected, indicating that high levels of ionizing radiation, likely at the time of the accident, may have been selected for darker coloration in Chernobyl tree frogs. (Written by Molly Womack)
This species was featured in news of the week August 28, 2023.
The Chernobyl nuclear power plant catastrophe occurred over 30 years ago and researchers are now gaining a better understanding of the long-term effects of nuclear exposure to wildlife. Recently, Car et al. (2023) surveyed populations of Hyla orientalis both within and outside of the Chernobyl Exclusion Zone to assess the population structure, genetic diversity, and individual gene expression. They found that frogs inside the exclusion zone had decreased body conditions, and smaller population sizes despite ongoing migration from low to high contaminated sites. Furthermore, populations within the exclusion zone had a unique transcriptome signature and more termination mutations in their energy metabolism pathways than those outside of the exclusion zone. While these results are correlative, they suggest either a relationship with radiation exposure and highlight the need for more research into the causal relationship of radiation exposure and long-term deleterious effects in wildlife. (Ann Chang)


Stoeck M, Dubey S, Kluetsch C, Litvinchuk SN, Scheidt U, Perrin N. (2008). "Mitochondrial and nuclear phylogeny of circum-Mediterranean tree frogs from the Hyla arborea group." Molecular Phylogenetics and Evolution, 49, 1019-1024. [link]

Originally submitted by: Michelle S. Koo (2022-10-09)
Distribution by: Michelle S. Koo (updated 2022-10-09)

Edited by: Michelle S. Koo (2023-08-26)

Species Account Citation: AmphibiaWeb 2023 Hyla orientalis: Eastern Tree Frog <> University of California, Berkeley, CA, USA. Accessed Jul 16, 2024.

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Citation: AmphibiaWeb. 2024. <> University of California, Berkeley, CA, USA. Accessed 16 Jul 2024.

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