Difference Between American Black Bear And Grizzly Bears

The bear have evolved along time ago and now there is only eight species existing. They evolved from early canids during the late Oligocene and early Miocene, about 25 million years ago. The earliest ancestors where the Dormaalocyon Latouri. An intermediate ancestor was the short faced bear, very similar to the modern day bear. It lived through the pleistocene period. It grew to thirteen feet long and was a herbivore. The ancestors to the modern day bears lived in the same climate and ate the same things. The modern bear contrast from the ancestor because the ancestor was more skinny and was smaller, and it was more cat like. The eight species of bear that still exist. They are the Polar bear, Brown bear, American black bear, Asian

The Grizzly Bear is a Keystone species. A keystone species is the center block, of which an ecosystem largely relies on. The Grizzly Bear lives in places such as alpine slopes, avalanche shoots and lower elevation wetlands.

Outside the british Columbia only about one in a million black bears are white. One of these bears,a subadult male lived near Orr, minnesota in 1996.Hair samples showed him to be genetically different from white Kermode bears.

Kermode Bears live in the heart of the Great Bear Rainforest. This rainforest is located in Central and Northern British Columbia, one of the wettest places on the face of the earth. Stretching over 402 km along the western coastline of Canada, this rainforest is home to many remarkable animals including the white Kermode Bear.

The Grizzly bears population has grown from about 200 in 1975 to approximately 600-1200 in the 18 million acers of the Greater Yellowstone ecosystem. (Yellowstone)

Grizzly Bears - they are large bears that inhabit North America. Many people hunt them.

Currently, most Louisiana black bears live in St. Mary and Iberia in south Louisiana, Tensas, and West Carroll Parishes in northeast Louisiana and Pointe Coupee in central Louisiana.(figure 4) However, male bears often wander long distances, so the sighting of Louisiana black bears are now common all over Louisiana, and west and southern Mississippi.

Most of the attacks occurred in the summer and fall months when the bears are eating the most in order to gain enough weight for the winter. Within each species, females with cubs were the most abundant in being the culprit for the attack, however, this number is difficult to verify due to the high number of unknown genders in the dataset. Black bear attacks occurred mostly in well-developed areas with high human densities while grizzly bear attacks occurred more in the backcountry where human populations are less

American black bears are the most common bears found in North America. They can be seen in at least 40 of the 50 states, Canada, and part of Mexico. Florida and Louisiana each have their own subspecies of the traditional black bear that make up small sections of the entire population.

Nearly 100 black, white bears exist on this big and beautiful world. This type of bears are nearly extinct, Because people try to hunt the extinct animals. Black white bears have a rare double recessive gene in it’s body. This is how people have the white and black fur. When 2 parents have the same recessive gene the result is white fur for their young. A lot people think that these bears are Polar Bears or even Albino’s, but they are just Kermode Bears.

Black bears typically live in either coniferous or deciduous forests. For their food, black bears also like to live near rivers with lots of plants and animals. These habitats range all over North America, including Alaska and North Mexico (American Black Bears, 2015). Black Bears can adapt to their habitats, especially when they are in hot or cold climates. In the different climates, like the hot of Mexico, or the cold of Alaska, their fur coat or color may be significantly darker or lighter.

Sister Species: The American Black Bear is a sister species to Ursus maritimus (Polar bear) and Ursus arctos (Brown bear).

Grizzly bears have had to adapt when the weather is off like having a warm winter it sets their internal clock off to where when they should be hibernating they are still out or cold weather comes late they are already awake from hibernation or cold weather comes to to early and they aren’t hibernating. They also have to deal with man made disasters like oil spills or fires, both can kill bears and kill what they eat like fish which could then kill the bears if they can not eat enough food because their immune system will deteriorate and kill them. Grizzly Bears are divergent because recent studies have shown that some grizzly bear’s mothers are polar bears and fathers are grizzly bears. This means that the fathers travel long distances to mate with mother polar bears. The most recent studies have suggested that they have been divergent from about 150,000 years ago. (Tia Ghose) Past research revealed that brown bears on ABC Islands, off the southeastern coast of Alaska, had mitochondrial DNA that look just like polar bear DNA.(Mitochondrial DNA comes only from the mother and is carried in the cytoplasm in the cell’s energy-making structures called mitochondria.) (Tia

This means that they eat nuts, berries, fruits, leaves, and roots and other animals from rodents to moose. For being 800 pounds and also being 5 to 8 feet they are fast animals running up to 30 miles and hour or sometimes 35 miles per hour. Grizzly bears once lived in much of Western North America and even the Great plains. When the europeans settled they killed many of these bears from both of these areas. Today the Grizzly bear population in the U.S. are safe because they are protected by law.

In North America, the grizzly bear is a keystone species - not as a predator but as ecosystem engineers. They transfer nutrients from the oceanic ecosystem to the forest ecosystem. The first stage of the transfer