A pair of humpback whales, believed to be a mother and her calf, surface in the deep water channel leading to the Port of Sacramento in West Sacramento, Calif., on May 16, 2007. The pair were first spotted on May 13 in the lower Sacramento River near the delta towns of Isleton and Rio Vista and surfaced near the Port of Sacramento late Tuesday.
(Photo: AP Photo/Rich Pedroncelli)
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