Twitter-icon.com has a great selection of twitter icons and buttons.
Site: sfnpc.org (San Francisco Neighborhood Parks Council)
The Neighborhood Parks Council seeks to
launch a renaissance of the San Francisco city park and recreation system
through community participation, with the goal of sustainable parks for
future generations.
Do you have a twitter account? If so it's important
to get as many people as possible to follow you.
Great follow me icon captures attention of the visitors
and brings more followers to your twitter account.
Choose great twitter icon for you website!