Crayfish Chimney

A typical “chimney” at the entrance to a crayfish burrow. Such chimneys are often found over the burrows of crayfish in floodplains, streamside woodlands, and ditches. They are built from mud pellets that the animals carry to the surface as they excavate their burrows. These chimneys may reach 10 inches (25 centimeters or more) in height.

Photo courtesy of Rebecca A. Bearden