Our photo of the day offers an avian mystery.
Upon first appearance, this photo by David Genney looks like an image of a mama duck and her chick. But wait a minute, that's not a duckling! David writes, "On seeing these two walking about together I realised that they weren't the same bird, one being a Mallard and the other a Moorhen chick. I had a look around for the chick's parent but couldn't see it. The chick appeared to be happy enough in the company of the mallard."
Would you like to see your nature photo featured as the TreeHugger photo of the day? Join TreeHugger’s Reader Photo Pool on Flickr and add your pictures to the group. Alternatively, send it to email@example.com with "photo of the day" in the subject line.