A unique collection of mites associated with hummingbird pollinated flowers, assembled over nearly 50 years by Dr. Robert Colwell, Distinguished Emeritus Professor in EEB, is now housed in the Biodiversity Research Collection. The collection consists of thousands of specimens mounted on slides, with nearly 3000 specimens from about 50 species identified to genus and species, and 578 specimens used in original descriptions of 16 species of hummingbird flower mites.