wild duck
Refers to ducks living in the wild, as opposed to domesticated ducks (家鴨, あひる). Commonly used in hunting, birdwatching, and culinary contexts.
秋になると、湖に野鴨がたくさん飛来する。
In autumn, many wild ducks come flying to the lake.
猟師は野鴨を狙って沼地へ向かった。
The hunter headed to the marsh to aim for wild ducks.
Compound of 野 (の, 'field, wild') and 鴨 (かも, 'duck'). The reading のがも is a straightforward combination of the kun'yomi readings of the two kanji.