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  • Check out these photos to learn more about invasive species in the western U.S. and Hawai'i.
  • Hawai'i: Banana poka, a vine from South America, has smothered over 70,000 acres of prime native forest in Hawai'i. Hardest hit have been the koa forests, which supply renowned hardwood and support rare birds and plants.
  • Arizona: Vinca is sold widely in plant nurseries, but is a difficult invasive once established. Volunteers spend hours trying to rid it along Ramsey Creek in Arizona's Ramsey Canyon Preserve.
  • New Mexico: Feral hogs are wreaking havoc, spreading disease and displacing wildlife. As much as 60 percent of their diet consists of frogs, lizards, snakes, birds and their eggs, and even deer fawns.
  • Hawai'i: Native to Puerto Rico, this tiny nocturnal frog has a loud, incessant call (louder than a leaf blower) that has hurt Hawaiian real estate values, and its appetite for insects threatens native ecosystems.
  • Hawai'i: With striking flowers and an exotic fragrance, Kāhili ginger is an attractive plant. Unfortunately, it is also highly invasive, choking out natives as it takes over the forest floor.
  • Colorado River: In the San Juan River and throughout the Colorado River Basin, channel catfish are causing havoc, thriving on a diet of Russian olive seeds, mice and native fish.
  • Wyoming: Invasive Russian thistle is most often the iconic plant seen rolling across a lonely highway. But tumbleweed can refer to any plant that dries out and tumbles away from its root.
  • Colorado: Scentless chamomille has been planted in Colorado mountains communities as “wildlflowers” but are taking over meadows, and showing up along roads and highways.
  • Utah: Visitors to the Great Salt Lake Shorelands Preserve often note the tall, feathery Phragmites reeds. But this invasive plant is a threat to the lake's fragile ecosystem that supports millions of migratory birds.
  • Donate to The Nature Conservancy to help fight invasive species.
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