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The American black bear (Ursus americanus), or simply black bear, is a species of medium-sized bear endemic to North America. It is the continent's smallest and most widely distributed bear species. It is an omnivore, with a diet varying greatly depending on season and location. It typically lives in largely forested areas but will leave ...
This is a collection of lists of mammal gestation period estimated by experts in their fields. The mammals included are only viviparous (marsupials and placentals) as some mammals, which are monotremes (including platypuses and echidnas) lay their eggs.
Possible hybridisation between different species of bear. An ursid hybrid is an animal with parents from two different species or subspecies of the bear family (Ursidae).Species and subspecies of bear known to have produced offspring with another bear species or subspecies include American black bears, grizzly bears, and polar bears, all of which are members of the genus Ursus.
The IUCN lists six bear species as vulnerable; [123] even the two least concern species, the brown bear and the American black bear, [123] are at risk of extirpation in certain areas. In general, these two species inhabit remote areas with little interaction with humans, and the main non-natural causes of mortality are hunting, trapping, road ...
The Florida black bear (Ursus americanus floridanus) is a subspecies of the American black bear that has historically ranged throughout most of Florida and the southern portions of Georgia, Alabama, and Mississippi. The large black-furred bears live mainly in forested areas and have seen recent habitat reduction throughout the state due to ...
Since reproductive success is positively correlated with age and size in bear populations, there are also males that do not mate at all until they are able to compete with larger males. [10] There is a very loose dominance hierarchy within bear mating systems due to their solitary nature. [ 10 ]
The mammalian female reproductive system contains three main divisions: the vagina and uterus, which act as the receptacle for the sperm, the ovaries, which produce the female's ova, and the vulva, which consists of the labia and clitoris. The vagina, uterus and ovaries are always internal while the vulva is external.
Each birth produces 1–3 cubs. Cubs will be nursed by mother for about six months. When they are strong enough to leave the den, bear cubs will remain with the mother for approximately two years, until the mother enters the next cycle of estrus and drives the cubs off. This forms the 2-year reproductive cycle of Formosan black bears. [6]