Tabanus trigonus (a species of horsefly)
A specific species of horsefly found in Japan; the name is usually written in katakana as ウシアブ.
The ushiabu is a large horsefly that sucks the blood of cattle and horses.
Katakana spelling is common for this insect name; usually written in kana.
Kanji form is rare and may not be widely recognized; the katakana spelling is preferred.
Compound of 牛 (ushi, 'cattle') and 虻 (abu, 'horsefly'), referring to its habit of biting cattle.