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

    Grand Canyon

    National Park Arizona

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  • Expect Isolated Afternoon and Evening Thunderstorms Through the Weekend

    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. Any persons having physical contact with bats in Grand Canyon National Park, please call 928-638-7767. Rabies can be prevented if appropriate medical care is given following an exposure. More »

Razorback sucker (Xyrauchen texanus)

Painting of a Razorback sucker Xyrauchen texanus by Joe Tomelleri.
Razorback sucker (Xyrauchen texanus) Status Endangered
Illustration by Joe Tomelleri
 
Razorback sucker (Xyrauchen texanus)
Status: Endangered

The razorback sucker was thought to be extirpated, or locally extinct, from Grand Canyon until 2012 when several adult razorback suckers were captured in the western Grand Canyon during surveying work. Prior to these occurrences, razorback suckers were last found in Grand Canyon more than 20 years ago. Recently, they have been found spawning in the Colorado River inflow at the upper end of Lake Mead. The National Park Service is currently planning studies to determine the status of the species in Grand Canyon.

Razorback suckers have a bony keel on their backs. They are the largest species of suckers that live in the Colorado River and reach and maximum length of 36 inches (900 mm). They may live 40 years or more. They feed on a variety of insects, crustaceans, and detrital matter.

Prior to the constructions of dams on the Colorado River and other human-caused alternations to their habitat, razorback suckers were widely distributed in the Colorado River and its major tributaries, and were typically found in calm flat-water reaches. There are at least ten historical records of razorback suckers caught in Grand Canyon, including a specimen caught in Bright Angel Creek in 1944. Today, the largest population, and possibly only population of wild reproducing razorback suckers, is in Lake Mead.

The species was listed as endangered in 1991. Critical habitat, including all of Grand Canyon National Park, for the species was determined in 1994.

Did You Know?

GRAND CANYON WONDER OF THE WORLD

The Grand Canyon is considered one of the natural wonders of the world largely because of its natural features. The exposed geologic strata, layer upon layer, rise over a mile above the river, representing one of the most complete records of geological history that can be seen anywhere in the world. More...