Take a glance at your feeders on a winter day and you might see chickadees and cardinals snatching up sunflower seeds, goldfinches dining on nyger seeds, woodpeckers chipping away at suet and juncos and sparrows scooping up spills on the ground.
It looks harmonious, even friendly, but looks can be deceiving in the natural world. While birds spend less time defending territories in winter, their tendency to flock up seems to compel them to play by strict rules. And even small birds that seem to be without many defenses are protected by social orders and carefully defined roles.
yes you are right...they don`t stay at one place ...they fly from one place and stay there for a while or one season and then go at different place...when i sit near beach i always have a pencil and a page and make their skatches...they look you know amazing when they are in mood and showing some fishy attitude