The hoazin

The thing I learned today is the existence of the hoazin, also known as stinkbird, a bird found in swamp regions and forests of South America.  It is interesting because its young possess claws on their wingtips, and because it is primarily a folivore and has a digestive system similar to that of ruminants.  For this reason, some have posited the hoazin as an ancestor of the Archeopteryx.