northern pintail; Anas acuta
A migratory duck species with a long, pointed tail; common in Japan during winter.
In winter, northern pintails come to the lake.
Katakana spelling is standard for this bird name; usually written in kana.
Kanji spelling is rare and mainly encountered in older or specialized texts.
The name オナガガモ literally means 'long-tailed duck', from 尾長 (long tail) and 鴨 (duck).