• View of Grand Canyon National Park at sunset from the South Rim

    Grand Canyon

    National Park Arizona

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  • From Monday Through Thursday, Warmer and Drier Weather Is Expected

    Monsoonal weather patterns have moved into the Grand Canyon area decreasing fire danger. As a result, on Tuesday, July 8 at 8 a.m. fire managers lifted fire restrictions within Grand Canyon National Park. More »

  • Two Bats Collected in the Park Have Tested Positive for Rabies

    One on the North Kaibab Trail and the other at Tusayan Ruin/Museum. Rabies can be prevented if appropriate medical care is given following an exposure. Any persons having physical contact with bats in Grand Canyon National Park, please follow this link. More »

New Zealand Mudsnail

New Zealand Mudsnail shell, Florida Caribbean Science Center

New Zealand Mudsnail

FL Caribbean Science Center

The New Zealand mudsnail, Potamopyrgus antipodarum was first discovered in the Snake River, Idaho in the 1980's. It is now rapidly spreading throughout the western US and has become established in rivers in seven western states and three national parks. It was discovered in the tailwaters below Glen Canyon Dam in March 2002. Subsequent searches in Grand Canyon found it distributed more than 225 miles downstream from the dam, so it was likely introduced several years earlier. Mudsnail populations often reaches densities greater than 100,000 per square meter in suitable habitat, and the species is associated with alterations in primary production and decreases in native invertebrate populations in rivers that it has invaded. Biologists are concerned about potential impacts it may have on native species, fisheries, and aquatic ecosystems in the western US.

Did You Know?

GRAND CANYON'S MATHER CAMPGROUND

On the South Rim, Mather Campground has over 300 campsites. More...