description Delta and Dawn Overview
Delta and Dawn were a mother-and-calf pair of humpback whales that entered the Sacramento–San Joaquin River Delta in May 2007, swimming more than 60 miles inland from the Pacific Ocean. Both animals had sustained injuries, including wounds consistent with boat propeller strikes. Over roughly two weeks, rescue efforts included playing recorded humpback calls and forming boat corridors to encourage their return. The pair eventually swam back to saltwater on their own after the interventions.
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