Mighty Hunter by Fred Machetanz, 1967

Postcard ID: US-2934629
Country: USA

Polar bear is my love from childhood. I think that this is my association forever: a little bear Umka from Soviet animation film.

The polar bear is a carnivorous bear whose native range lies largely within the Arctic Circle, encompassing the Arctic Ocean, its surrounding seas and surrounding land masses. It is a large bear, approximately the same size as the omnivorous Kodiak bear. A boar (adult male) weighs around 350–700 kg (770–1,540 lb), while a sow (adult female) is about half that size. Although it is the sister species of the brown bear, it has evolved to occupy a narrower ecological niche, with many body characteristics adapted for cold temperatures, for moving across snow, ice, and open water, and for hunting the seals which make up most of its diet. Although most polar bears are born on land, they spend most of their time at sea. Their scientific name means "maritime bear", and derives from this fact. Polar bears hunt their preferred food of seals from the edge of sea ice, often living off fat reserves when no sea ice is present.

For decades, large scale hunting raised international concern for the future of the species but populations rebounded after controls and quotas began to take effect. For thousands of years, the polar bear has been a key figure in the material, spiritual, and cultural life of Arctic indigenous peoples, and polar bears remain important in their cultures.

Also this card has amazing set of stamps, with polar bear, butterfly and other things!

Old postcard with bears (20 years)

Postcard ID: NL-2618943
Country: Netherlands

The sender wrote that this card is a gift of her father. He presented it when she was 10 years old! So now this card is 20 years old. Wow!

I also have different bears in my childhood. Unfortunately, don't have postcard from that time :( I think that such cards are special as they keep specific atmosphere of a period of time.

Here is a stamp:

Alaskan brown bears with cubs

Postcard ID: US-2815879
Country: USA

These bears look so nice and cute, however I don't want to meet them in the forest. Brown bears live not only in Alaska ;)

The brown bear, which is distributed throughout  the northern hemisphere, includes several subspecies. In North America, these subspecies include the Mexican brown bear, the grizzly bear, and the Alaskan brown bear. Alaskan brown bears are found in coastal areas where salmon is the primary food source. Brown bears found inland are called grizzly bears. Brown bears have been known to live 34 years in the wild, although this is rare. Old females may live to 26 years of age. In comparison to the black bear, the brown bear is usually larger, has a more prominent shoulder hump, and has longer, straighter claws. The long claws are useful in digging for roots or excavating the burrows of small mammals. The musculature and bone structure of the hump are adaptations for  digging and for attaining the bursts of speed necessary to capture moose or caribou. 

Brown bears have an especially good sense of smell, and under the right conditions they may be able to detect odors more than a mile away. 

Here is a nice almost programmer stamp: