orchestra vs band

I don't know the difference and anybody care to show or tell me the difference?

From wikipedia orchestra is http://en.wikipedia.org/wiki/Orchestra, and band is http://en.wikipedia.org/wiki/Band_%28music%29?

Anyway, check these out. I personally think they are impressive. Playing instrument while doing the formation, it is awesome. You guys can search starwinds at youtube and get more clippings.

http://www.youtube.com/watch?v=kfq0riLOtxE&feature=related

http://www.youtube.com/watch?v=A-llinmEZGc&feature=related

I recommend us to promote them and try to get them more opportunities and avenues to demonstrate their talent...