Key Differences Between Alaska Coastal Brown Bears And Interior Bears?

Coastal vs Interior Habitat

The primary difference between Alaska Coastal Brown Bears and Interior Bears lies in their habitat and diet. Coastal bears inhabit the rugged coastline, where they feed on salmon, shellfish, and other marine delicacies. This diet allows them to thrive in the area, with some populations reaching densities of up to 10 bears per square mile. In contrast, Interior Bears roam the vast tundra and forest expanses, where they forage for berries, grasses, and small mammals. This diet is more varied and abundant, but the bears are scattered across a much larger area, with densities typically ranging from 1-5 bears per square mile.

Physical and Behavioral Characteristics

Coastal Brown Bears tend to be smaller than their Interior counterparts, with adults weighing between 300-600 pounds (136-272 kilograms), whereas Interior Bears can reach weights of 600-1,500 pounds (272-680 kilograms) or more. Coastal bears also have a more slender build, allowing them to navigate the rocky coastline with ease. In contrast, Interior Bears are larger and more muscular, with thick coats to withstand the harsh winter conditions. This physical adaptation allows them to hibernate for up to 5 months during the winter, whereas Coastal bears typically only hibernate for 3-4 months.