why are polar bears called opportunistic feeders ?

polar bears go hunting

Polar bears feed on a wide range of items but their all time favorite food is unmistakably the ringed seal. Polar bears just love the flesh and high calorie blubber of these marine mammals. The bears will often hangout for hours at the openings of 'seal holes' waiting to ambush any returning seals.

Polar Bears are extremely crafty and patient hunters. They sometimes go for weeks without getting any food, so they seize every opportunity to make certain of a kill when they spot a prey. They will wait patiently til the victim comes within striking distance, and then strike quickly and ferociously.

Depending upon their location, polar bears also eat harp and hooded seals and scavenge on carcasses of beluga whales, walruses, narwhals, and bow head whales. When other food is unavailable, polar bears will eat just above any animal they can get, including reindeer, small rodents, seabirds, waterfowl, fish eggs and even vegetation. 

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