Hunters participating in a wolf- and coyote-shooting contest in east-central Idaho killed 30 coyotes but no wolves.
Idaho for Wildlife's Steve Alder says the Predator Hunting Contest and Fur Rendezvous that ran Friday through Sunday near Salmon drew less than 100 hunters, down slightly from last year.
A 4.9-magnitude earthquake struck about 60 miles to the north of Salmon on Saturday and was followed by aftershocks on Sunday.
The quakes caused no damage but Alder says experienced hunters reported the temblors spooked animals in the region and made hunting more challenging.
The U.S. Bureau of Land Management issued the group a permit to use BLM lands but revoked it in November following two lawsuits by environmental groups.
The derby instead was held on private ranches and Forest Service land.