invasive animals

The Wyoming Game and Fish Commission is calling on the National Park Service to cancel its plans to use aerial gunning to remove invasive mountain goats from Grand Teton National Park.

On Wednesday, the commission passed a resolution condemning the plan, writing, "Having government personnel kill mountain goats from helicopters and leaving them to rot and be wasted is unacceptable."

Herds of mountain goats occupy mountain ranges all around the Mountain West. Not all are native, though, and some of those transplants are causing problems. That's the case in Wyoming's Teton Range.

Rae Ellen Bichell / Mountain West News Bureau

Feral pigs cause an estimated $1.5 billion in damage each year, especially to crops. Now concern is mounting they could be at the doorstep in parts of the Mountain West.

The pigs — which an expert at the USDA has called "one of the most destructive and formidable invasive species in the United States" — could come across the Canadian border into Montana, or traipse into Colorado from the feral pig stronghold of Texas.

American bullfrog
Dyan Bone / Kaibab National Forest

Several northern Colorado communities are banding together to rid the region of American bullfrogs, an invasive species hurting the native population of northern leopard frogs.

The Longmont Times-Call reports Jefferson and Boulder counties, along with Longmont, Boulder and Fort Collins, are working with a Denver-based environmental consultant to come up with a plan to substantially decrease the population of the larger predatory bullfrogs.

Matt Lavin / Flickr

According to the Western Governors Association, species like the Canada thistle and common carp aren’t just nuisances -- they’re a matter of western biosecurity.