http://www.celestin.com/seagulls/faq.html

Some of them do. 1) "My school is a home to about 50 seagulls, and it is really cold and snowy, but the seagulls never seem to leave. Do they even migrate? or do they just stay in the cold? Some gulls migrate, some do not. "Yellow-footed Gulls are native to the Gulf of California in Mexico. Most individuals are non-migratory, but an increasing number have been traveling to California's Salton Sea during nonbreeding periods. The population is estimated at about 60,000 and appears to be stable." Some migrate different distances, due to age. "Some species practice partial migration, whereby some individuals remain at the breeding ground year-round, while others migrate. Others employ differential migration, in which all members of the population migrate, but for periods of time and over distances that vary as a function of age or sex. For example, herring gulls migrate for increasingly shorter distances the older they get..." "Evidence from recoveries from Dave Sowter?? and previous ringing schemes indicate that the vast majority of locally bred Lesser Black-backed Gulls migrate south during their first autumn and remain in the wintering areas of Iberia and Morocco until they are mature enough to breed, perhaps in their fourth year. These observations suggest that a small, but perhaps increasing number of immatures are either over-wintering or returning earlier than they used to. Possible reasons to account for this apparent change in behaviour include the increased availability of food as a result of landfill sites and/or global warming (D. Sowter, pers. comm..)." Experiments have been done to determine why some gulls migrate and others do not: "4. Gulls innate nature: Gull Cross-fostering experiment. For birds, experiments have been done whereby the eggs of one bird can be switched with that of others. For example, Herring gulls are non-migratory, while Lesser Black-Backed gulls are migratory. People have switched these eggs around and looked for a change. Turns out that the young that were raised with the non-migratory birds, actually did migrate. The opposite, however, did move with the migratory parents because they thought they were just following the parents." And some birds that have traditionally been migratory are not migrating, due to more available food supplies: "Gulls in their ??atural??environment are migratory but urban gulls often display non-migratory behaviour due to the hospitable urban environment. " " Source and further information: http://feeding-pets-tips.com/do-seagulls-migrate-542.html 2) "But consider: in Anton Chekhov's "The Seagull" the unstated sad joke is that seagulls migrate each year from central Russia to the sea, but never make it there because it's too far away. They return after each season without reaching their journey's end, driven by instinct to try again next year, unable to break the pattern of unfulfilled motion." Source and further information: http://www.musicdish.com/mag/index.php3?id=1201

miRgrate?

Yeah, to trashcans yo...

We don't have an Ocean for about 160 miles from us, and they are always in the market parking lot...They must follow the river up. I don't think they go back and forth, so they are just permenant fixtures in the lot..They are Messy!

Yes seagulls migrate. I used to have them at my house in Penns Grove and even if I fed them they would leave in summer for Canada or Europe depending on species. picture at http://www.city-data.com/picfilesc/picc32499.php