Orphaned grizzly cub or black bear: which one faces a tougher return to the wild?

A five-year study (Ciarniello, August 2026) found an 83% mortality rate for rehabilitated orphaned grizzly cubs. Oversized rehab yearlings often hit a "metabolic trap" where they can't find enough food to support their massive frames without a mother's guidance. How does this compare to the survival challenges of black bears? Source: Frontiers in Conservation Science. Sourced photographs.