noun
vesper bat; Asian particolored bat; evening bat
Refers to bats of the family Vespertilionidae, especially Vespertilio sinensis. In everyday Japanese, it is often used as a general term for small bats.
ヒナコウモリは夕方になると餌を探しに飛び回る。
The vesper bat flies around hunting for food in the evening.
この地域ではヒナコウモリがよく見られる。
Vesper bats are often seen in this area.
こうもり is the general word for 'bat', while ヒナコウモリ specifically refers to vesper bats or the Asian particolored bat.
The name likely derives from ひな (small, chick) and こうもり (bat), referring to a small species of bat. The exact origin is uncertain.