(No) Kangaroos in Austria

 Those that know me will possible remember I have a tee-shirt with the slogan "No Kangaroos in Austria", purchased at the tourist office in Vienna a few years ago.

This week's Feedback column in New Scientist reports that a kangaroo has been spotted roaming in the vicinity of Kirchschlag in Austria.  What's more, none of the local zoos are missing a kangaroo.

Does this mean I can't wear the shirt anymore?