Episode 6: When is a steelhead not a steelhead?

Most anglers listening to this podcast likely have an understanding that the species Oncorhynchus mykiss exhibits a complex of reproductive behaviors that generally involve summer-run steelhead, winter-run steelhead, and resident rainbow trout that all can spawn in the same river. But is it a case that ‘never the twain shall meet’? And if not, what differentiates young steelhead from resident rainbow trout in such river systems?