Asian grass frog; Indian rice frog; cricket frog
A small frog species (Fejervarya limnocharis) found in paddy fields and wetlands across Asia. Often called 'cricket frog' in English.
Asian grass frogs are croaking in the rice paddy.
Katakana spelling is common for this animal name.
Kanji spelling is rare; the word is usually written in kana.
Compound of 沼 (numa, 'swamp') + 蛙 (kaeru, 'frog'). The exact derivation is straightforward.