CALIPATRIA, CA - JUNE 23: Brown pelicans fly at dawn over the Sonny Bono Salton Sea National Wildlife Refuge, a major stop for birds on the Pacific Flyway, on June 23, 2006 near Calipatria, California. Californians are bracing for the possible arrival of the H5N1 Influenza Virus, commonly known as the Bird Flu, later this summer in what could be the first sign of the deadly virus in the US as North American and Asian birds mingle in Alaska before their southward migration. Government officials plan to test 75,000 to 100,000 wild birds in Alaska and other locations as well as test some 50,000 water and bird dropping samples from waterfowl habitats along the Pacific flyway. (Photo by David McNew/Getty Images)