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In 2014, the population was between 160 and 200 sheep, and Montana Fish, Wildlife, & Parks worked to relocate 59 sheep to other herds in Northwest Montana. [10] Three of the top five bighorn sheep recorded by the Boone and Crockett Club during the three years 2015-2018 came from Wild Horse Island.
Horses on the Pryor Mountains Wild Horse Range in Montana. The BLM distinguishes between "herd areas" (HA) where feral horse and burro herds existed at the time of the passage of the Wild and Free-Roaming Horses and Burros Act of 1971, and "Herd Management Areas" (HMA) where the land is currently managed for the benefit of horses and burros, though "as a component" of public lands, part of ...
[69] However, there are few non-anthropogenic means that limit their population growth and keep their numbers in balance. [71] In 1972, the BLM approached Jay F. Kirkpatrick and John W. Turner and requested that they find a contraceptive that could be used to check the population growth of the free-roaming horses.
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The Office of Management and Budget (OMB) has designated more than 1,000 statistical areas for the United States and Puerto Rico. [2] These statistical areas are important geographic delineations of population clusters used by the OMB, the United States Census Bureau, planning organizations, and federal, state, and local government entities.
The results of the study by the NAS were released in June 2013, and covered a wide variety of issues, including the carrying capacity of wild horse and burro ranges, wild horse and burro population growth, and best practices in fertility control.
According to Jared Bybee, BLM wild horse and burro specialist, grass cover on the range was at 18 percent of its historic average. [51] [99] Sixty percent of the remaining horses would be males, to reduce the rate of population growth. [51]