When you think of Texas, what comes to mind? It may be wide open spaces, longhorn cattle, cowboys and ten gallon hats. Now, there’s something else to add to the list – the oldest, definitive bird fossil in North America. That bird is Flexomornis howei, from the Woodbine Formation (lower Middle Cenomanian) near Grapevine, Texas.
I first encountered the bones while prospecting potential fossil sites around Grapevine Lake. This is located just north of Dallas-Forth Worth International Airport, in north-eastern Tarrant County. One exposure near the lake soon produced a large number of fossils eroding out on the surface. They included petrified and carbonised wood, amber, at least two types of turtle, two types of crocodile, numerous remains of bony fish, shark teeth and vertebrae, parts of an ornithopod, a nodosaur, ostedeoderms, and a few scraps of small theropods.