noun
flesh fly
Refers to any fly of the family Sarcophagidae. In everyday contexts, the katakana spelling ニクバエ is standard.
ニクバエは腐った肉に卵を産み付ける。
Flesh flies lay their eggs on rotting meat.
Compound of 肉 (にく, 'meat') and 蠅 (はえ, 'fly'), with rendaku voicing. The exact historical derivation is straightforward.