EAB adults are dark metallic green in color, with a coppery red or purple abdomen under the wings. The insect is approximately 1/2-inch long and 1/8-inch wide. Adults may be present from late May to September, but are most commonly active and visible in June and July, when they lay eggs on the bark of ash trees.
EAB larvae are creamy white in color and are found under the bark, so are not as obvious, but their expanding S-shaped galleries (tunnels) can be located if the bark is removed. Larvae can be located using proper branch peeling techniques.
Note that other metallic-green beetles and larval insect stages can be confused with EAB. Talk to a professional forester, arborist or other tree care professional if unsure about the possible presence of EAB in or on an ash trees.