Agrilus anxius

Agrilus anxius, the bronze birch borer, is a wood-boring buprestid beetle native to North America, more numerous in the warmer parts of the continent and rare in the north.^[1] It is a serious pest on birch trees (Betula), frequently killing them. The river birch Betula nigra is the most resistant species, while other American birches are less so. European and Asian birches have no resistance to it at all and are effectively impossible to grow in the eastern United States as a result.^[2]

Bronze birch borer
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Coleoptera
Suborder:	Polyphaga
Infraorder:	Elateriformia
Family:	Buprestidae
Genus:	Agrilus
Species:	A. anxius
Binomial name
Agrilus anxius Gory, 1841

It is closely related to the emerald ash borer.