I tend not to count the one on the left because I think it's one with a long body (legs on the body) and only the very end is meant to be a tail.
The one on the right maybe, but it's hard to tell if the legs are leaking onto the legs because of a lack of space, and it's drawn rather fishlike (look at it sideways, it's basically a fish with legs added), which means that maybe only the very end is intended to be the tail (I've seen a few like this) BUT...
the Vienna one is a VERY good example of legs-on-tail. Unambiguous. Excellent.
The one on the right maybe, but it's hard to tell if the legs are leaking onto the legs because of a lack of space, and it's drawn rather fishlike (look at it sideways, it's basically a fish with legs added), which means that maybe only the very end is intended to be the tail (I've seen a few like this) BUT...
the Vienna one is a VERY good example of legs-on-tail. Unambiguous. Excellent.