SAN FRANCISCO - A wayward mother whale and her calf were headed through a deep water shipping channel toward the Pacific Ocean Sunday, nearly a week after taking a wrong turn and swimming inland 90 miles to the state capital, the
U.S. Coast Guard said
By 9 p.m. on Sunday the whales had traveled 20 miles down the Sacramento River from the Port of Sacramento, where crowds had gathered to catch a glimpse of the humpbacks. As darkness fell, the Coast Guard escort that had followed the whales all day ceased trailing the whales so the vessels would not accidentally hit them.
Nicknamed Delta and Dawn, the humpback whales started moving toward the Pacific at around 3:30 p.m., swimming at about 6 miles-per-hour toward Rio Vista, a town located about 45 miles from Sacramento. From Rio Vista it is another 60 miles to San Francisco Bay.
Vessels carrying Coast Guard officers and wildlife officials were to start following the whales again at 7:30 a.m. Monday. A helicopter will try to locate the pair when the sun rises, said Coast Guard Petty Officer Brian Leshak.
Jim Oswald of the Marine Mammal Center said the whales may have decided to change course after tug boats started their engines about 100 yards away from them.
"The tugs were out in the basin and the whales decided to follow them," Oswald said.
Boats will be positioned at the mouths of tributaries where the whales could possibly go off course, said Carrie Wilson, a marine biologist with the California Department of Fish and Game.
"We've got a bunch of metal pipes and hammers, and if we need to... we can give the other boats pipes to bang on to persuade the animals not to turn in the wrong direction," she said.
The whales still have a long way to go and obstacles to overcome if they maintain their course. Officials said there are sloughs leading to muddy deltas that could trap the injured whales, which appear to have been wounded by a ship's propeller.
Wilson said there was no indication Sunday that the whales were in poor health. "They have been very consistent, and moving along at a good pace," she said.
If the whales don't continue on their current course toward the ocean, marine mammal rescue crews will resume trying to lure the pair in the right direction by playing recorded sounds of other humpbacks feeding. That strategy worked in the case of a humpback named Humphrey, who in 1985 swam in the delta for nearly a month before returning to the Pacific