harvest fly

US /ˈhɑːrvɪst flaɪ/
UK /ˈhɑːrvɪst flaɪ/
"harvest fly" picture
1.

a large insect with transparent wings that makes a loud, high-pitched sound, found in warm countries

:
The loud buzzing of the harvest fly filled the summer air.
Children often try to catch harvest flies in the fields.