Brown-headed Nuthatch, Sitta pusilla:
Guntersville Dam Recreational Area, Alabama
The Brown-headed Nuthatch is a small nuthatch that climbs headfirst down the trunk of trees searching for insects. This nuthatch is one of the few tool users in the animal kingdom. This little engineer uses a piece of bark as lever to pry up other bark as it looks for food. It has been observed carrying its bark tool from tree to tree as it searches for food.
Nikon D800, Nikkor 500mm f/4, 1/640 second @ f/7.1