It does appear to be an issue.
I did not, however, find a resource recommending we should therefore stop addressing habitat conversion, energy development, conifer intrusion, climate change, and cheatgrass...in favor of a sage grouse strategy that focuses soley on WNV and predators. Maybe 88man has more info.
Understanding impacts of disease on wild bird populations requires knowing not only mortality rate following infection, but also the proportion of the population that is infected. Greater sage-grouse (Centrocercus urophasianus) in western North America are known to have a high mortality rate...
pubmed.ncbi.nlm.nih.gov
Mosquitoes can carry dangerous diseases — like the West Nile virus. Turns out, the mosquito-transmitted virus is deadly for one of the West’s most iconic birds: the sage grouse.
www.opb.org