The warning song of Missouri's largest venomous snake - the timber rattlesnake. Shannon County conservation agents recently relocated this rattler after a landowner found it in his chicken house. Though the landowner understood and appreciated the role this snake plays in Missouri's ecosystem, he didn't want it around his outbuildings or yard. The timber rattlesnake is mainly active from April through mid-October. It frequents rough country and is mostly nocturnal in the summer, so few Missouria