This is a video my mate recorded of me changing Pilgrim the Turkey Vulture's water. Pilgrim is very feisty and bites quite often, so I started using a broom to keep her at bay so she doesn't attack me while I'm changing her water.
(She doesn't come after me when I feed her)
Anyways, this is usually what it looks like, she doesn't try to climb up after me or anything, and hops off when I'm done, so I figure she's just having fun playing.

http://www.youtube.com/watch?v=vIUJpm2Wews