Miner bees: Perdita salicis euxantha

(Hymenoptera: [Apoidea:] Andrenidae: Panurginae: Perditini)

Profile prepared by Matthew Shepherd, The Xerces Society for Invertebrate Conservation

Perdita salicis euxantha is rare species with a restricted distribution and uncertain population status. It is endemic to the Columbia Basin and has been collected only from one site in Oregon and two sites in Idaho. Little is known of its biology.

red list profile

conservation status

Xerces Red List Status: Vulnerable
Other Rankings:

Canada – Species at Risk Act: N/A
Canada – provincial status: N/A
Mexico: N/A
USA – Endangered Species Act: N/A
USA – state status: N/A
NatureServe: N/A
IUCN Red List: N/A

A rare endemic species with a restricted distribution and uncertain population status.

taxonomic status

Perdita (Perdita) salicis euxantha Cockerell, 1896.

life history

The flight period of Perdita salicis euxantha is June to July (Tepedino and Griswold, 1995). Like all members of the tribe Perditini, P. salicis euxantha nests in the ground. (Perdita nests differ from the majority of andrenid nests in that the cells are unlined or only partially lined.) Nearly all species of the tribe Perditini are specialist foragers. It is assumed that P. salicis euxantha, like other subspecies in the salicis complex, are dependent on willow (Salix sp.) flowers.

It has been recorded in one habitat type within the Columbia Basin, Agricultural.


Perdita salicis euxantha has been collected only from Kiger Island, OR, and two sites in Idaho and Nez Pierce counties, ID.

threats and conservation needs
The threats facing this species are currently unknown. A conservation need is to ensure that suitable flowering plants persist and that appropriate nesting substrate remains. Little is known of the biology of this species. Studies of both the nesting and foraging habits would be valuable.

Michener, C.D. 2000. The Bees of the World. Baltimore, MD: Johns Hopkins University Press.

Tepedino, V.J., and T.L. Griswold. 1995. The bees of the Columbia Basin. Final report, USDA Forest Service, Portland, OR. 212 pp (Technical Report)

additional resources

California Academy of Sciences; Andrenidae Primary Types in CAS Collection; available online (Accessed November 17th, 2004.)

Nomina Insecta Neartica (Accessed November 17th, 2004.)


Shepherd, M. D. 2005. Species Profile: Perdita salicis euxantha. In Shepherd, M. D., D. M. Vaughan, and S. H. Black (Eds). Red List of Pollinator Insects of North America. CD-ROM Version 1 (May 2005). Portland, OR: The Xerces Society for Invertebrate Conservation.