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Colorado winter bird migration carries increased risk of avian flu exposure to wildlife, domestic animals

CPW warns people to avoid sick wildlife

MAGNA, UTAH - AUGUST 02: California Gulls sit on an exposed sand bank at the Great Salt Lake on August 02, 2021 near Magna, Utah. As severe drought continues to take hold in the western United States, water levels at the Great Salt Lake, the largest saltwater lake in the Western Hemisphere, have dropped to the lowest levels ever recorded. The lake fell below 4194.4 feet in the past week after years of decline from its highest level recorded in 1986 with 4211.65 feet. Further decline of the lake's water levels could result in an increase in water salinity and could generate dust from the exposed lakebed that could impact air quality in the area. The lake does not supply water or generate electricity for nearby communities but it does provide a natural habitat for migrating birds and other wildlife. According to the U.S. Drought Monitor, 99 percent of Utah is experiencing extreme drought conditions. (Photo by Justin Sullivan/Getty Images)
MAGNA, UTAH – AUGUST 02: California Gulls sit on an exposed sand bank at the Great Salt Lake on August 02, 2021 near Magna, Utah. As severe drought continues to take hold in the western United States, water levels at the Great Salt Lake, the largest saltwater lake in the Western Hemisphere, have dropped to the lowest levels ever recorded. The lake fell below 4194.4 feet in the past week after years of decline from its highest level recorded in 1986 with 4211.65 feet. Further decline of the lake’s water levels could result in an increase in water salinity and could generate dust from the exposed lakebed that could impact air quality in the area. The lake does not supply water or generate electricity for nearby communities but it does provide a natural habitat for migrating birds and other wildlife. According to the U.S. Drought Monitor, 99 percent of Utah is experiencing extreme drought conditions. (Photo by Justin Sullivan/Getty Images)
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By Ali Longwell, Vail Daily

As migrating bird populations begin to travel through Colorado during late fall and winter, Colorado Parks and Wildlife expects an increase in wild birds infected with highly pathogenic avian influenza.

The state wildlife agency issued a press release on Dec. 10, warning Coloradans to avoid sick wildlife.

Waterfowl and shorebirds are particularly susceptible to avian influenza transmission, as they will gather in large numbers around bodies of water, which facilitates the spread of the virus.

High path avian influenza has been a concern among domestic and wild birds in the United States since 2022, when it was detected in a commercial U.S. flock. By the end of 2022, there were detections in all lower 48 states, whether in wild birds, commercial flocks or backyard flocks.

It has impacted nearly 10 million domestic birds in Colorado since 2022 and 127 million nationwide, according to the state’s Department of Agriculture. The strain detected causes high mortality rates in wild and domestic birds with no known cure or treatment.

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