As we talk about predation I have seen a series of recent papers that have followed to development of Cormorant rookeries (breeding colonies) in the Salish Sea, both BC and US. One very interesting conclusion is that there was no cormorant nesting, at least in saltwater sites, until after the beginning off the 20th Century. Apparently, consumption of eggs by natives and settlers prevented nesting in-Sound. What this means is that the presence of breeding corms in-Sound is something new and represents a new predator and not part of the evolutionary history.