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. 2014 Mar 5;4:4233. doi: 10.1038/srep04233

Figure 5. Images of the fossil feather ascribed to Gansus yumenensis (ANSP 23403).

Figure 5

(a) Photograph of the isolated feather from the Xiagou Formation showing varying color pattern; black at the top, and red-brown toward the base. It is beyond the scope of this paper to determine whether this apparent color variation reflects the actual biological color of the feather or taphonomic alteration. (b,c) Higher magnification images of the dense black distal region (b) and the finer, brown proximal region.