Strange Creature and Skull found on Mars Curiosity Photograph - July 16, 2013

Looking through the latest photo's from Mars I found on Sol 335 two anomalies what appears to be a skull and a strange object what looks like a living being who turns his head.

The object appears on two different photo's.
1. Navcam: Left B - 2013-07-16 08:43:50 UTC Link photo
2. Navcam: Right B - 2013-07-16 08:43:50 UTC Link photo

Object 1: Living Being? 

Object 2: Skull 

Living being or is just 'Pareidolia' ( The psychological phenomenon “pareidolia” is the tendency to find faces, or facial features in inanimate objects. Humans sometimes see things where they are not) or is it because the different position of the camera's Navcam left B and Navcam right B, what makes that it looks like a living being who turns his head?