Length: 10 - 14 mm
Cucujus clavipes is beautifully colored in bright red. The antennae, tibiae, and tarsi are black. The head is widest at the eyes.
This species is economically beneficial, since both larvae and adults are predacious on beetle species that damage timber stands. The flattened body shape allows Cucujus clavipes to move around under bark, and even to move into the tunnels of wood borers and bark beetles, where it stalks its prey.
Above: their flat design allows Cucujus clavipes to travel in narrow galleries or crevices in wood.
Adults overwinter under bark, singly or in groups.
Right: Ventral view of Cucujus clavipes. The abdomen is dark. Note the femora, which give the species its name clavipes, which means club-shaped feet.
Photo location for all photos on this page: Ruraldale, Upshur County, West Virginia.
On the map at the bottom of this page the provinces and states with records of Cucujus clavipes are shown in blue-green. Note that this beetle has been reported from Newfoundland but not Labrador (Bousquet 1991).