When I moved from coastal California to Boise, one thing I thougt I would be leaving behind were seagulls. I'm not an expert so I may also include terns, bitterns, and other sea birds in the loose expression "seagull". But to my amazement there are tons of these guys flying around here. Boise is at the edge of the Rockies, and is about 500 miles from the Pacific. What the heck are they doing here??