The collections are non-circulating, but available by appointment Monday through Friday, 9 a.m. to 4 p.m.

Active Excavation Sites
* Fort Crittenden (snails, turtles, clams, early fish and dinosaur bones)
* Payson (many bones of armor-plated fish)
* Safford (giant capybara, horses, camels and a Glyptotherium)
* Zuni Basin (several animals new to science including dinosaur Zuniceratops)
* Moenkopi (trackways, amphibians and reptiles)
* New Sauropod (partial skeleton of a sauropod)

Closed Site Collections
* Saint Johns (bone fragments and teeth of phytosaurs and metoposaurs)
* Milk Creek (horse and camel bones and teeth)
* Wikiup (bear and bird bones)

Collections
* Nisbet Invertebrate Collection
* Russian Dinosaur and Mammal-like Reptile Casts
* Larry Marshall Marsupial Dentition Collection