By Jennifer McRae

(CBS4)– It’s a spooky sight in Southern Colorado as tarantulas begin their annual migration. Colorado Parks and Wildlife posted video of the Oklahoma brown tarantulas migrating through La Junta County.

(credit: Colorado Parks and Wildlife)

Scientists say the majority of the spiders are 10-year-old males looking to mate with females hidden in Colorado’s grasslands.

(credit: Colorado Parks and Wildlife)

Officials say tarantulas are mostly harmless to humans, but have bites that can cause injury or allergic reaction and hairs that can be irritating to the eyes, mouth and nose.

(credit: Colorado Parks and Wildlife)

The peak time to view the migration is mid-September near Comanche National Grassland south of La Junta off U.S. Highway 109.

Jennifer McRae