By Tom Gillespie @TomGillespie1

BOISTEROUS polar bears enjoy a harmless scrap in the snow - standing up on their back legs and trading blows like professional boxers

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The Hudson Bay polar bears stand-up tall as they enjoy grappling in the snow

The playful animals also bared their teeth and tried to knock each other down in the good-natured bout.

Nature photographer Justin Black watched the playfight unfold after encountering the animals on a trip to the western shore of Canada's Hudson Bay.

The larger of the two animals appears to knock the other one down in the brawl

He is unsure how old the larger bear was, but the animal was first spotted in the area roughly eight years ago.

Justin believes the younger bear was between six and eight years old and it is unclear if the two animals are brothers.

One of the bears seems ready to deliver a left hook to the other during the good-natured scrap
The upper hand: The smaller bear had an obvious disadvantage in the battle

He said: "Standing out on open ground close to two massive sparring polar bears is one of the most incredible experiences of my life – almost indescribable.

"On the one hand, these are immensely powerful animals that are considered to be one of the few, or the only, species that will actively predate on humans.

"That is, they have been known to stalk people over long distances in order to kill and eat them.
 

Justin Black has had an interest in the impacts of climate change for roughly 20 years and visited Hudson Bay to survey the polar bear population

"On the other hand, they are also calm, confident, serene, intelligent creatures that are as playful as a dog."

The 42-year-old, from Washington DC, has had an interest in the impacts of climate change for roughly 20 years.

He organised the expedition to Hudson Bay in order to track the population of polar bears in the area.

Justin, who took these photos in November this year, said: "What we found was remarkable.

Hudson Bay polar bears have a different diet to their Arctic counterparts - as they benefit from a high concentration of beluga whales in the summer

"At a time of year when one might think the bears should have been at their leanest following several months without sea ice on which to hunt their preferred prey of ringed seals, we found an abundance of rather well fed polar bears.

"Unlike bears in the high Arctic, however, the Hudson Bay bears benefit from a summer concentration of beluga whales, some of which approach close to shore and within reach of clever bears.

"The larger one has been seen hunting beluga whales successfully. I don’t have any behavioral history on the smaller one."