I brought these images to the attention of several astrobiologists and the general opinion is that they are probably just geological formations. Still, I believe that there could very well be large forms of life on Mars since many of the ingredients appear to be present.

If these are animals, then they could belong to the same species since their heads seem flat-topped, and there is a lighter coloration of a large patch of skin below the head area on both. Also, when you look carefully, you'll notice that the tail area in the image above appears to be segmented. For the best quality full-size image download, click here. Or if you prefer, you can click on either of the two pictures above for a faster-loading medium quality full-size image.