Associated Press: Since 1967, birder and teacher Gene Cardiff has trekked with students to California’s mountains and deserts to catch a glimpse of the white-headed woodpecker, or other rare sights. But Cardiff, an ornithologist who lives near San Bernardino, said the state’s drought conditions over the past few years have devastated bird food sources in his area’s forests and deserts, leading to fewer birds to watch. “I can’t do a good job teaching my class because there are no birds to see,” …