The turkey has a reputation for being the dumbest bird. The popular bird has gotten this reputation from observations of its behavior. For instance, it is a common rumor that turkeys are so dumb that they drown during a rainstorm.
It is a myth that turkeys drown due to opening their beaks and staring at the sky during a rainstorm. However, it is true that turkeys do tilt their heads and stare at things briefly. According to How Stuff Works, this behavior is caused by an inherited condition called tetanic torticollar spasms. The condition causes turkeys to behave oddly at times. Another reason for their strange behavior is their monocular vision. Turkeys have little depth of vision and must tilt their heads to see better.