A pretty large flock of pelicans lives about a mile away from here. Sometimes in the spring a few of them will land on the pond. I immediately run them off with a lot of leaden noise. Pelicans take a long time to wind up enough speed to get airborne. Apparently the effort and trouble are not worth it to them and they stay away until the following year.
A non-resident pond owner may never know that these birds are eating the fish in their ponds.
Interestingly enough, neither cormorants nor pelicans like GSF.