Lice Outbreak in CA May be Causing Balding Deer, Impacting Herd Numbers May 31, 2013 California,

California Deer Disease News and Information Archive



... another possible side effect of the lice: as deer spend more time grooming, they become easy targets for coyotes and mountain lions.  “While this theory is still under investigation, what we do know is that the louse has impacted migratory populations of California deer, which now have a low fawn survival rate, making it difficult to replenish the herd,” a senior biologist said...

Exotic deer lice infestation hits deer in West, including Nevada June 5, 2013 California, Las Vegas Review
... “We’re very concerned about the potential impacts on the deer population,” said Greg Gerstenberg, a senior wildlife biologist with the California Department of Fish and Wildlife... During heavy winters in 2009-10 and 2010-11, mortality rates of 30 percent to 50 percent were recorded for mule deer in Stanislaus National Forest near Yosemite National Park in California.  With patches of hair gone, it’s harder for deer to stay warm ...

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