noun
owlfly
Refers to any insect of the family Ascalaphidae. A technical term used in biology and nature contexts.
ツノトンボはトンボに似ているが、触角が長い。
Owlflies resemble dragonflies but have long antennae.
このあたりでは夏にツノトンボが見られる。
In this area, owlflies can be seen in summer.
Compound of 角 (つの, 'horn') + トンボ (とんぼ, 'dragonfly'), referring to the insect's long, clubbed antennae that resemble horns. The exact historical derivation is uncertain.