• Red-breasted Mergansers eating Sculpins shows both the male and female eating a sculpin.
  • I have seen this quite a bit and I suspect most of the ones they are eating are the Staghorn Sculpins.
  • These sculpins have “sharp horns” that make them very difficult to swallow.
  • So the mergansers have to try to subdue them before attempting to swallow the sculpins.
  • Look at this article on Staghorn Sculpins by Mary Willson