It's either a bird, an angel or an airplane... take your pick!
I say bluebird or butterfly....
it could also be a dove
Saw you on eb and tought I would check out your blog ...that mark looks just like the DODGE SUPER BEE LOGO ...I owned a 69 Dodge Super BEE ..http://www.bing.com/images/search?q=69 Dodge super bee logo ...Bike Jedi
It's a Twitter bird! :D