The invertebrate paleontology collection is ranked among the top 10 largest fossil invertebrate collections in the country and has over 900,000 fossil invertebrate and microfossil specimens from all over the world, including more than 6,000 type specimens.
The Ornithology collection is the third largest avian osteological collection in the world, and the second most diverse avian tissue collection in the world. The study skin collections total > 60,000 specimens.
The paleobotany collections, including several “orphaned” collections, is comprised of compression, impression, petrified, and permineralized specimens from Precambrian to Pleistocene stratigraphic horizons and from various localities around the world. The focus of the collection is currently on Permian, Triassic, and Jurassic fossils from Antarctica (Antarctic Collection), the largest collection of Antarctic fossil plants in the world. Additional material includes Pennsylvanian, Permian, and Cretaceous compression-impression specimens from several localities in eastern and central Kansas and coal balls from the Midcontinent, USA.