The distinctions are fairly clear, at least to me. Aquatic species and migratory birds are the domain of the federal government. Caribou and other mammals are generally and foremost the domain of the provincial government. SARA would require the federal government to intervene if the provincial governments weren't demonstrating effective protection.
This is why we need to start making decisions about socio-economics and recovery strategies, because that's where the rubber starts to hit the road.