noun
crested kingfisher
A species of kingfisher (Megaceryle lugubris) found in Japan and East Asia, often near mountain streams.
渓流でヤマセミを見つけた。
I spotted a crested kingfisher at the mountain stream.
Common kingfisher (Alcedo atthis), smaller and more colorful than the crested kingfisher.
From 山 (yama, 'mountain') + セミ (semi, 'kingfisher'). The kanji 翡翠 and 魚狗 are both used for kingfisher species.