Yellowstone National Park has started capturing bison migrating outside the park and will hold them for possible slaughter as part of a population reduction program.
A park spokeswoman says six animals have been captured so far in operations that began Sunday in the Gardiner Basin area on the Yellowstone-Montana border.
State and federal officials want to reduce Yellowstone's bison herds this winter by up to 900 animals under an agreement intended to shield Montana’s cattle industry from the disease brucellosis.
The park has about 4,900 bison.