Length: 6 to 10 mm
Bombardier Beetles (numerous species in several genera) counterattack against predators by ejecting a mixture of hydroquinone and hydrogen peroxide, producing a noxious gas and an audible pop.
The map at the bottom of this page shows states with published records of Brachinus adustipennis colored in blue-green. This species has no records from Canada or Latin America.
Photo data: 25 July 2019. Pitkin, Vernon Parish, Louisiana. At the BugGuide annual gathering.
Image determined by Dr. Peter W. Messer.