The Malayan Sun Bears Look Like Humans Wearing a Bear Costumepic.twitter.com/uW3pkAcOQW
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
I presume it was an actual skin too (see also the Cowardly Lion).
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.