Anatomy and evolution of the feeding apparatus in the avian orders Coraciiformes and Piciformes.    From Wordnik.com.  [ScienceBlogs Channel : Life Science]

Piciformes.    From Wordnik.com.  [Bird lists] Reference

Ancient ostriches Palaeotis weigelti, roller-like bird Coraciiformes, woodpecker Piciformes, Galliformes, Falconiformes, Plataleidae, Diatrymas, Messel rails Messelornis cristata, Juncitarsus merkeli, Aenigmavis sapaea, Palaeoglaux sp., and Aegialornis szarskii are included amongst identified bird specimens.    From Wordnik.com.  [Messel Pit fossil site, Germany] Reference