http://identify.whatbird.com/obj/106...Cormorant.aspxThe northern populations are often called Mexican or Olivaceous Cormorants, and many authors treat these as a separate species, P. olivaceus.
You know Tri-city park and Ralph B never had cormies in it ........then the DFG put candy trout in there and low and behold - what followed. Sorta a double edged sword. We got the bass bigger faster - but on the same hand, we got those friggin cormorants. Something I noticed when I use to live out there.