noun
laughing gull
A species of gull (Leucophaeus atricilla) known for its laughing-like call.
海岸でワライカモメが鳴いている。
A laughing gull is calling on the shore.
カモメ is the general term for 'gull' or 'seagull'; ワライカモメ is a specific species.
From 笑い (わらい, 'laughing') + 鴎 (かもめ, 'gull'), a calque of the English name 'laughing gull'.