
Keywords: gray
Which zoos have them?
Smithsonian National Zoological Park (United States)The American bison is listed as Conservation Dependent (LR/cd), the focus of a continuing taxon-specific or habitat-specific conservation programme targeted towards the taxon in question, the cessation of which would result in the taxon qualifying for one of the threatened categories below within a period of five years, on the IUCN Red List of Threatened Species
Namings for the American bison
A young / baby of a American bison is called a 'calf'. The females are called 'cow' and males 'bull'. A American bison group is called a 'herd or troop'.Some facts about the
American bison
Adult weight : 630 kg (1386 lbs)
Maximum longevity : 34 years
Female maturity :912 days
Male maturity : 912 days
Gestation : 274 days
Weaning : 259 days
Litter size : 1
Litters per year : 1
Interval between litters : 452 days
Weight at birth : 20 kg (44 lbs)
Weight at weaning : 158 kg (347.6 lbs)

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