I found this intimidating wasp-like bug on my large driftwood mount yesterday. He was about 1 1/2" long from the tip of his head to tip of his behind and he had a 1" spike/stinger looking thing protruding from his butt. He kept tapping the wood with his butt spike while pacing all over the wood. Can anyone I.D. this guy? Is he some type of mud dauber? Should I grab a can of bug spray?