We often have people ask us about whether the orcas wear tags and if that is how we know where they are.  Since the Southern Residents are listed as an endangered species, researchers are not given permission to attach tags to them.  The same logic that discourages the use of tags is the same safety-based thinking that prohibits taking skin or blood

White dot on dorsal fin is satellite tag. Photo courtesy of Cascadia Research

samples from the resident orcas, thereby limiting the...