hi jaclyn! it's from the "social bird" icon set. there are a bunch of really cute birds, free to use, from great illustrators (including jess gonacha!). you can access it here: http://www.inspiredm.com/2009/04/12/the-social-bird-icon-set-the-first-inspired-release/

there are so many great places to find icons online. that's one thing i'm hoping to post about on taragentile.com. thanks for asking!