Cucujus clavipesis known as the flat bark beetle . It is found throughout North America . These are generally found near tree line under bark of dead poplar and ash trees . C. clavipes are described as phloem-feeding and often predators of other small insects, such as wood-boring beetles, and mites . These are usually seen during spring-summer seasons . Having a cold habitat, these beetles must go through several physiological mechanisms to survive; they are