[2] Its habitat exists within the Tongass National Forest, which is part of the perhumid rainforest zone.

[citation needed] The ABC Islands bears depend on a diet of various flora and fauna that is endemic to the region.

For flora and funga this includes grasses; other plants like bulbs; berries like salmonberries and blueberries; and mushrooms.

[citation needed] The ABC Island bears are usually solitary creatures, except in areas with plentiful food sources.

The ABC Islands bears will reach sexual maturity on average at the age of four to seven years, with mating occurring between May and July.

Winter hibernation for these bears occurs between the months of October until April, with June at the latest.

It was believed to be related to strong currents existing in the waters around the island which prevented the bears from swimming to nearby land masses.

The study was also looking at the possibility of refugium during the Last Glacial Maximum, in which the Cordilleran Ice Sheet covered much of the Pacific coast.

[dubious – discuss] A study on matrilineal polar bear hybridization in relationship to Irish lineage was conducted.

Comparisons have shown that the ABC Islands had polar bears present during the Last Glacial Maximum, but Ireland most likely did not have proper habitat.

[5] Fossil remains from the Last Glacial Maximum (LGM) show that there was no habitat suitable for brown bears to occupy during this time.

[5][11][12] However, fossils in this area did show a concentration of marine mammals, especially ringed seals, which are a common staple to polar bears diet.