S-shaped tunnels created by southern pine beetle are visible in this round “cookie” or slice of wood from beneath the bark of a pitch pine tree. Photo credit: NYS DEC
Southern Pine Beetle Tunnels, NYS DEC
S-shaped tunnels created by southern pine beetle are visible in this round “cookie” or slice of wood from beneath the bark of a pitch pine tree. Photo credit: NYS DEC
New York State Parks Blog 
