Under the Monroe and Sibley system, the Laridae are a large family of sea birds. SubFamilies are:
I wish I could tell you more, but the whole science of Biology is in a disgusting state of disrepair. If you can find more information, please post it! You are more than welcome to assimilate my writeup into yours.
Larinae (gulls, turns, skimmers, skuas and jaegers)
Alcinae (auklets and murrelets)