The halfcat, attracting newly revived interest on Twitter thanks to this blog post, appears to have first been spotted in this blog post in August 2009. But there are no attributions. The latest reports pin it to Street View - not mentioned in the original posting - and it certainly appears to be Street View image, but, lacking coordinates, the halfcat seems destined to be a mystery forever, one of any number of mythical beings, lost in the Clouds.
More interesting than the halfcat’s strangeness, perhaps, is its unknowability. Someone saw the halfcat, snapped it, but the route back is lost. The databases contain such multitudes of new myths.