Invasive Threats to Black Canyon Fisheries
NEW ZEALAND MUDSNAIL
There is no environmentally sound or inexpensive way to eliminate New Zealand mudsnails once they are introduced.
Please help prevent further spread of these invaders:
It is a state and federal offense to transport or release New Zealand mudsnails.
Please report any sightings of New Zealand mudsnails to a park ranger.
Whirling Disease is a parasitic infection affecting primarily rainbow and cutthroat trout populations. The Gunnison River is already positive for this parasite, however, detailed information about this disease and its prevention and control is available from the Colorado Division of Wildlife.
Did You Know?
The Gunnison River through Black Canyon of the Gunnison National Park drops at an average of 95 feet per mile. By comparison, the Colorado River through Grand Canyon National Park drops an average of 7.5 feet per mile.