In Southwest Idaho, approximately 4,000 geese including snow geese have died in the Parma area out of a population of 50,000 migratory birds.  The Southwest Regional Office of Wildlife Health Laboratory has recorded a number of locations with dead geese and ducks including an outbreak in Nyssa, Oregon, on the Snake River near a wildlife refuge. 

Based on initial post-mortem examinations, mortality was attributed to pasteurellosis, but laboratory assays are in progress to eliminate highly pathogenic avian influenza.