red-legged partridge
A bird species (Alectoris rufa). The name is usually written in katakana as アカアシイワシャコ.
The red-legged partridge is a bird that lives in southwestern Europe.
Katakana spelling is standard for this bird name; usually written in kana.
Kanji spelling is very rare and mostly found in older or specialized texts; the katakana form is preferred.
Compound of 赤足 (あかあし, 'red legs') + 岩鷓鴣 (いわしゃこ, 'rock partridge'). The exact derivation is uncertain, but the name describes the bird's appearance and habitat.