11 May 2009

Williamson's Sapsucker

Williamson's Sapsucker (Sphyrapicus thyroideus) is one of the most unique North American woodpeckers. When it was first discovered, it was believed to be two separate species as it is so sexually dimorphic. One species was described in which no female had ever been discovered, and another in which only females had been observed. This female Williamson's Sapsucker was photographed on the Telegraph Road in Mesa County on 9 May 2009. The male is almost entirely jet black. I figured a woodpecker this cool deserves its own post.

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