National Geographic has just published an amazing series of photographs that chronicle the hidden lives of rare birds. This kakapo blends so perfectly with its environment that it's easy to see why they are so hard to find.
Kakapo photograph by Shane McInnes
You can see NatGeo's full series of images on their site.
Thanks, Marilyn Terrell!
Red crowned crane by Huajin Sun
Brazilian merganser by Savio Freire Bruno
Christmas Island frigatebird by David Boyle
Great Indian bustard by Csaba Barkoczi