"Half a dozen men with walkie-talkies and cattle prods set out on foot at sunrise Thursday to coax a herd of 10 feral bison into a corral a mile away at the bottom of a Santa Catalina Island valley.
It wasn't easy. In the final days of the mating season, a massive bull kept one beady eye on his cows, all of them pregnant, and the other on his human pursuers, who followed close behind shouting and waving their arms as the animals lumbered up steep slopes and into plunging ravines.
It was one of several herding operations that will culminate today with the inoculation of female bison older than 2 years, part of an experimental program designed to limit the population through contraception."
Louis Sahagun reports for the Los Angeles Times November 20, 2009.