BILLINGS, Mont. — Yellowstone National Park administrators say the park's bison population is up to an estimated 4,230 animals, including 600 calves born this year.
The park's two herds increased in size by a combined 14 percent over last year's count.
The peak bison population was seen in 2005, when about 5,000 were recorded.
During harsh winters, bison attempting to migrate outside the park have often been captured and killed to prevent the possibility of them spreading disease to cattle.
A proposal by the Montana Department of Fish, Wildlife and Parks would ease restrictions and allow them to roam free year-round.
- International tax competitiveness report: See...
- Islamic State group calls for attacking...
- 11 best—and worst—state tax systems
- 'Maze Runner' races past 'Tombstones' with...
- Jailed, some mentally ill inmates land in...
- 'The Lion King' earns record box office
- White House intruder identified as Army...
- Ex-stepson: White House intruder meant no harm
- Striking or spanking a child is not a... 20
- Yellen says US families need to boost... 10
- Security breached: Intruder gets into... 9
- How much America wants to be taxed 9
- Iranian youth behind 'Happy' video... 8
- Thousands march in NYC, around globe... 8
- It's not just young people —... 7
- Islamic State group calls for attacking... 5