noun
spring cicada; Terpnosia vacua
A species of cicada that emerges in spring, known for its distinctive call. The name is often written in katakana as ハルゼミ.
ハルゼミの鳴き声が聞こえると、春が来たと感じる。
When I hear the call of the spring cicada, I feel that spring has arrived.
Compound of 春 (はる, 'spring') and 蝉 (せみ, 'cicada'), referring to a cicada that appears in spring.