Frogs_043_pc.jpg Eric Mills searched his net after sweeping the muddy pond looking for a frog. Mills came up empty after several attempts. Armed with two nets, Eric Mills wades out into the Lily Pond at Golden Gate Park in search of an African

frogs_043_pc.jpg Eric Mills searched his net after sweeping the muddy pond looking for a frog. Mills came up empty after several attempts. Armed with two nets, Eric Mills wades out into the Lily Pond at Golden Gate Park in search of an African clawed frog on 4/29/04 in San Francisco. PAUL CHINN/The Chronicle (Photo By Paul Chinn/The San Francisco Chronicle via Getty Images)