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That's caused a loss of riparian forest, which supported birds and other wildlife, and pushed four native fish — humpback chub, bonytail chub, Colorado pikeminnow and razorback sucker — to the brink of extinction.

Lake Mead Fish Hatchery, which used to breed endangered razorback sucker and bonytail chub, ceased operations earlier this year when the lake dipped below the point where the hatchery drew its water.

They were making their way steadily eastward through the razorbacks that formed South Georgia’s spine.

It also follows a July Fish and Wildlife proposal to move another rare Colorado River fish, the razorback sucker, from endangered status to threatened.

Whether you call them feral pigs, boar, swine, hogs, or even razorbacks, wild pigs are one of the most damaging invasive species on Earth, and they’re notorious for damaging agriculture and native wildlife.