A Flock of Seagulls

Is the Tea Party Movement like a flock of birds?  How do they stay together?  How do they follow a coherent vision?  There's no singular leader, but somehow all the members know what the group, if you can call it that, believes in.

Note to self:  Don't google how a flock of birds flies together.  All you'll get back are links to sites which talk about airplane flights from hell.