The first thing that came to mind when I saw that this week’s photo challenge was “unique”, was the photograph below of a Gemsbok with only one horn. Not only do Gemsbok have very unique facial markings, they all have exceptionally long sweeping horns. With which they create wonderful geometrical patterns when they are standing together in a group (see here). Usually they have two of them though – this Gemsbok has lost one of its horns.
To join in the fun go to Weekly Photo Challenge: Unique.