Moor frog
Rana arvalis Nilsson, 1842
LCLeast Concernfrogs and toads
The moor frog (Rana arvalis) is an amphibian in the frogs and toads subgroup, belonging to the family Ranidae and the order Anura. It is a small frog with an adult body mass of 10.8 g, and it is an invertivore whose main foods are arthropods.
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Quick facts about the moor frog
Its microhabitat is aquatic, arboreal and terrestrial, and its activity pattern is cathemeral. The moor frog lays eggs, 2,300 per clutch, with a larval stage in its development, and it is listed as Least Concern on the IUCN Red List.
- Weight
- 10.8 gsrc for Weight
- Length
- Not recorded
- Lifespan
- up to 11 yearssrc for Lifespan
- Diet
- Invertivoresrc for Diet
- Main food
- arthropodssrc for Main food
- Habitat
- Not recorded
- Young per litter or clutch
- 1,599 – 3,000src for Young per litter or clutch
- Reproduction
- Eggssrc for Reproduction
- Active
- Day and night (cathemeral)src for Active
- Conservation status
- Least Concern (IUCN)src for Conservation status
- Countries on record
- Not recorded
Photos of the moor frog
Only freely licensed photos are shown. Each carries its creator and licence.
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1 more photo exists under a licence we cannot display: view at source.
Where does the moor frog live?
Not recorded
What is the moor frog?
The moor frog (Rana arvalis) is a slim, reddish-brown, semiaquatic amphibian native to Europe and Asia. Moor frogs are known for their ability to freeze solid and survive thawing. The frog makes use of various cryoprotectants i.e. antifreeze that decrease its internal freezing temperature. The species is distributed over a large range, covering a significant portion of Eurasia. Male moor frogs are known to turn blue temporarily during the height of mating season. This coloration is assumed to signal a mate's fitness. Moor frogs typically mate through multimale amplexus, a form of polyandry.
The moor frog spawns its eggs in large batches in still bodies of acidic waters. Human-caused pollution is causing excessive acidification of habitat which harms egg health. The moor frog's habitat is also under destruction due to a variety of other anthropogenic means. The species has an IUCN listing of Least Concern. However, a majority of European states independently consider the conservation status of the moor frog to be unfavorable. The moor frog, like other members of Rana, is omnivorous and will consume anything that it can physically ingest.
From the Wikipedia article “Moor frog” (en.wikipedia.org/w/index.php?title=Moor_frog&oldid=1360210805), by Wikipedia contributors, licensed under CC BY-SA 4.0 (creativecommons.org/licenses/by-sa/4.0). This block is kept separate from our own text.
What does the moor frog sound like?
Is the moor frog endangered?
The moor frog is listed as Least Concern on the IUCN Red List: it is not currently at risk of extinction.
- LCLeast Concern
- NTNear Threatened
- VUVulnerable
- ENEndangered
- CRCritically Endangered
- EWExtinct in the Wild
- EXExtinct
Category via Wikidata (CC0). Find the full assessment on the IUCN Red List. See all Least Concern species.
How is the moor frog classified?
- kingdomAnimalia
- phylumChordata
- classAmphibia
- orderAnura
- familyRanidae
- genusRana
- SpeciesRana arvalis Nilsson, 1842
Synonyms Rana altaica, Rana altaica, Rana angustifrongs, Rana angustifrongs, Rana arvalis altaica, Rana arvalis arvalis, Rana arvalis issaltschikovi, Rana arvalis striata, Rana arvalis wolterstorffi, Rana asiatica oxyrrhinus, Rana oxyrhina, Rana oxyrhina, Rana oxyrhinus striatus, Rana oxyrhinus var. striatus, Rana oxyrrhinus, Rana palustris, Rana temporaria arvalis, Rana temporaria oxyrrhina, Rana terrestris, Rana terrestris wolterstorffi, Rana ulginosa, Rana wolterstorffi
Other names and names in other languages (37)
- Altai brown frogEnglish
- Altai brown frog (Altai Mountains populations)English
- Altai brown frog (Altai Mountains populations)English
- Field frogEnglish
- Siberian frogEnglish
- Swedish swamp frogEnglish
- Жаба вастрамордаяBelarusian
- Skokan ostronosýCzech
- Spidssnudet frøDanish
- MoorfroschGerman
- Rana de PáramoSpanish
- RabakonnEstonian
- viitasammakkoFinnish
- Grenouille oxyrhineFrench
- Grenouille des champsFrench
- Močvarna smeđa žabaCroatian
- Mocsári békaHungarian
- Rana arvaleItalian
- ヌマアカガエルJapanese
- Smailiasnukė varlėLithuanian
- Purva vardeLatvian
- spissnutefroskNorwegian Bokmål
- HeikikkerDutch
- Spissnutet froskNorwegian
- Zaba MoczarowaPolish
- Żaba moczarowaPolish
- Rã-mouraPortuguese
- Broasca de mlaștinăRomanian
- Остромордая лягушкаRussian
- Ostromordaya LyagushkaRussian
- Skokan ostropyskýSlovak
- plavčekSlovenian
- Barska SabaSlovenian
- åkergrodaSwedish
- Жаба гостромордаUkrainian
- 田野蛙Chinese
- 田野林蛙Chinese
Catalogue of LifeWikipediaiNaturalistTAXREFWikidataWoRMSIUCN Red List
Relatives of the moor frog
Other species in the same genus Rana.
Common frog
Rana temporaria
Agile frog
Rana dalmatina
Greek frog
Rana graeca
Iberian frog
Rana iberica
Asiatic grass frog
Rana chensinensis
Brusa frog
Rana macrocnemis
CompareMoor frog vs Common frogMoor frog vs Agile frogMoor frog vs Greek frogMoor frog vs Iberian frog
Common questions
Each answer is written from the sourced facts on this page, and only where they hold the answer.
What kind of animal is the moor frog?
The moor frog is an amphibian in the frogs and toads subgroup. It belongs to the family Ranidae and the genus Rana.
What does the moor frog eat?
The moor frog eats arthropods. It is classed as an invertivore.
How heavy is the moor frog?
An adult Moor frog weighs 10.8 g, which places it in the small size class.
Is the moor frog endangered?
No. The moor frog is listed as Least Concern on the IUCN Red List, which is not a threatened category.
How long does the moor frog live?
The moor frog lives up to 11 years, according to the highest value reported by our sources.
How many eggs does the moor frog lay?
The moor frog lays 2,300 eggs per clutch, with reported values from 1,599 to 3,000. Its development includes a larval stage.
Who named the moor frog?
The moor frog was named Rana arvalis by Nilsson, 1842.
What are other names for the moor frog?
The moor frog is also called Field frog, Siberian frog, Altai brown frog and Swedish swamp frog.
Sources and how to cite this page
Data as of 2026-11-11. How this page is put together.
- AmphiBIO, a global database for amphibian ecological traits · CC BY 4.0 · v1
Oliveira, B.F., São-Pedro, V.A., Santos-Barrera, G., Penone, C. & Costa, G.C. (2017) AmphiBIO, a global database for amphibian ecological traits. Scientific Data 4: 170123. https://doi.org/10.1038/sdata.2017.123. Data: https://doi.org/10.6084/m9.figshare.4644424.v5 - Catalogue of Life eXtended Release · CC BY 4.0 · 2026-10-16 XR
Catalogue of Life (2026). Catalogue of Life eXtended Release, version 2026-10-16 XR. Catalogue of Life Foundation, Amsterdam, Netherlands. https://doi.org/10.48580/dgzlf - Wikimedia Commons · per file (CC0 / public domain / CC BY green, CC BY-SA amber, anything else not displayed) · 2026-11-11
Wikimedia Commons contributors. Wikimedia Commons. https://commons.wikimedia.org (each file credited to its author under its own licence). - Wikidata · CC0 1.0 · 2026-11-11
Wikidata contributors. Wikidata. https://www.wikidata.org (data retrieved via the Wikidata Query Service). - Wikipedia (English) · CC BY-SA 4.0 · 2026-11-11
Wikipedia contributors. Wikipedia, The Free Encyclopedia. https://en.wikipedia.org (text under CC BY-SA 4.0; each block names its article and revision).
Embed a card for this animal on your own site
Copy this code. The card shows the photo with its credit, key facts and a link back to this page.
CreatureData. (2026). Moor frog (Rana arvalis). Retrieved from https://creaturedata.com/animals/moor-frog
“Moor frog (Rana arvalis).” CreatureData, 2026, https://creaturedata.com/animals/moor-frog.
@misc{moor_frog_2026,
title = {Moor frog (Rana arvalis)},
author = {{CreatureData}},
year = {2026},
url = {https://creaturedata.com/animals/moor-frog},
note = {Data as of 2026-11-11}
}