This Crawdad looks like it is trying to block me from continuing my hike but this is what they do when they feel threaten. I spotted it crossing a trail that I was on and when I got low to photograph it the Crawdad rears up, raising its claws threateningly. Most of the time they will also move backwards, flinging mud.
Crawdad Facts and Camera Settings
Crawdads live under rocks and debris on the muddy bottom of freshwater lakes and streams. They are active at night and crawl along the mud feeding on aquatic vegetation, worms, insects, mollusks, and decayed organic matter. Their pincerlike claws are used to crush and tear food into smaller pieces.