Do bears mate outside their species?

Question

Can a grizzly bear mate with a black bear, or a panda bear with a polar bear?

Answer 1

Its kind of the same as asking if a tiger can mate with a lion.

Its already been done!

So theres a possibilty they could, but its pretty rare to happen.

Theyre in the same species, so they could.

Its also like mating a Poodle with a Pomeranian. Pompoodle.

Answer 2

In 1859, a black bear and a European brown bear were bred together in the London Zoological Gardens, but the three cubs did not reach maturity. In "The Variation Of Animals And Plants Under Domestication," Charles Darwin noted:In the nine-year Report it is stated that the bears had been seen in the Zoological Gardens to couple freely, but previously to 1848 most had rarely conceived. In the Reports published since this date three species have produced young (hybrids in one case)... Since black bears and brown bears have differing numbers of chromosomes, it is unlikely that such hybrids, if proven, would be fertile.Hybrids between the (European) brown bear and the grizzly bear (now considered to be a North American variety of brown bear rather than a separate species) have been bred in Cologne, Germany. See grizzly bear for taxonomy.Polar/Brown Bear Hybrid, Rothschild Museum, Tring Polar/Brown Bear Hybrid, Rothschild Museum, TringSince 1874, at Halle, a series of successful matings of polar bears and brown bears were made. Some of the hybrid offspring were exhibited by the London Zoological Society. The Halle hybrid bears proved to be fertile, both with one of the parent species and with one another. Polar bear/Brown bear hybrids are white at birth but later turn blue-brown or yellow-white. An adult polar bear/brown bear hybrid bred in the 19th Century is now displayed at the Rothschild Zoological Museum, Tring, England Crandall reported the first polar bear/brown bear crosses as occurring at a small zoo in Stuttgart, Germany in 1876 rather than Halle in 1874. A female European brown bear mated with a male polar bear resulting in twin cubs in 1876. Three further births were recorded. The young were fertile among themselves and when mated back to European brown bears and to polar bears. DNA studies indicate that some brown bears are more closely related to polar bears than they are to other brown bears. All the Ursinae species (i.e., all bears except the giant panda and the spectacled bear) appear able to crossbreed. "Kodiak" or "Kodiak brown" is a term now applied to brown bears found in coastal regions of North America. In the far north these bears feed on salmon and often attain especially large size. "Alaskan Brown" is sometimes used for Alaskan bears, but the main distinction is how far the bear is found from the coast. Grizzly bear is the term used for the brown bear of the North American interior.

In 1936, a male polar bear accidentally got into an enclosure with a female Kodiak (Alaskan Brown) bear at the US National Zoo, resulting in three hybrid offspring. One hybrid was named Willy and grew into an immense specimen. The hybrid offspring were fertile and able to breed successfully with each other, indicating that the two species of bear are closely related. The Kodiak is also considered by many to be a variant or subspecies of the basic Arctic (circumpolar) brown bear. in a 1970 National Geographic (Vol 137:4, April 1970) article, "White Tiger in My House", Elizabeth C. Reed mentions being foster mother to 4 hybrid bear cubs from the National Zoological Park in Washington, where her husband was director. In 1943, Clara Helgason described a bear shot by hunters during her childhood. This was a large, off-white bear with hair all over his paws. The presence of hair on the bottom of the feet suggests it was not an unusually colored Kodiak brown bear, but a natural hybrid with a Polar bear.  

The Grizzly bear is now regarded by most taxonomists as a variety of brown bear, Ursus arctos horribilis.Clinton Hart Merriam, taxonomist of grizzly bears, described an animal killed in 1864 at Rendezvous Lake, Barren Grounds, Canada as "buffy whitish" with a golden brown muzzle. This is considered to be a natural hybrid between a grizzly bear and polar bear. On April 16, 2006 a polar bear of unusual appearance was shot by a sports hunter on Banks Island in the Northwest Territories. DNA testing released May 11, 2006 proved the kill was a Grizzly/Polar Bear hybrid. This is thought to be the first recorded case of interbreeding in the wild. The bear was proven to have a polar mother and a grizzly father. The DNA testing also spared the hunter the C$1000 fine for killing a grizzly bear, and the risk of being imprisoned for up to a year. The hunter had bought a license to hunt polar bears; he did not have a license to hunt grizzly at that time. The animal had dark rings around its eyes, similar to a panda's but not as wide. It also had remarkably long claws, a slight hump on its back, brown spots in its white coat, and a slightly indented face — the nasal "stop" between the eyes which polar bears lack. [3] The guide leading the hunt, Roger Kuptana of Sachs Harbour in the Northwest Territories, was the first to note the oddities.Several names were suggested for this specimen. The Idaho hunter who killed it, Jim Martell, suggested polargrizz. The biologists of the Canadian Wildlife Service suggested grolar or pizzly, as well as nanulak, an elision of the Inuit nanuk (polar bear) and aklak (grizzly or brown bear). Both grolar and pizzly were used by the Canadian Broadcast Corporation [4] in widely-distributed stories.Presently, though the mating seasons overlap, the polar bear's season begins slightly earlier than the grizzly bear's. A blog columnist for the Seattle Post-Intelligencer suggested that more hybrids may be seen as global warming progresses and alters normal mating periods. Dateline Earth Blog, reporter Lisa Stiffler, "You got your grizzly in my polar bear," May 11, 2006 The Canadian Wildlife Service noted that grizzly-polar hybrids born of zoo matings have proven fertile.Grizzly bears have been sighted in what is usually polar bear territory in the Western Arctic near the Beaufort Sea, Banks Island, Victoria Island, and Melville Island. A "light chocolate colored" bear, possibly a hybrid, is reported to have been seen with polar bears near Kugluktuk in western Nunavut.Hybrids have been produced between the sloth bear (Melursus ursinus) and the Malayan sun bear (Ursus malayanus) at Tama Zoo in Tokyo, and also between the sloth bear (Melursus ursinus) and the Asiatic black bear (Ursus thibetanus, or Selenarctos thibetanus).

Pictures

Grizzly-polar bear hybrid

http://en.wikipedia.org/wiki/Image:Polar...

Answer 3

Whilst it is physically possible for all bear species to mate, not all of them can interbreed. The giant panda, for example, diverged early in its evolutionary history from other bears, and is too different to be able to produce young with any of them. However, grizzlies are known to have mated with polar bears on occasion, producing a hybrid called a 'grolar' or 'pizzly' bear.

EDIT: In response to Kimberly's answer, I would just like to point out that breeding two bear species is completely different to breeding a Poodle and a Pomeranian. Poodles and Pomeranians are the same species - they're both domestic dogs. In contrast, a brown bear (Ursus arctos) - of which the grizzly is a subspecies - is a totally different species to, say, a polar bear (Ursus maritimus).

Answer 4

Yes, it is possible but extremely rare.  Hybrid species are usually sterile (such as mules).  Here is a website that shows a few examples of hybrid species.

http://www.hemmy.net/2006/06/19/top-10-h...