Could the local mosquito control efforts, particularly the spraying of pesticides for adult mosquitoes, be killing the birds?
Based on safety reports available from the EPA, many of the pesticides being used by local agencies for mosquito control are considered to have very low toxicity to birds.
There have been many reports of new mammalian species infected with West Nile Virus (WNV) this season, such as goats, reindeer, a wolf, and dogs. Has the virus changed?
It is possible that there may have been a mutation in the virus that is causing a higher number of species to be affected this year. There is currently no evidence of significant mutation in the U.S.
Questions about human health and West Nile virus:
Visit the USGS National Wildlife Health Center (NWHC) to learn more about specific
Since 1999, West Nile Virus has been detected in at least 48 species of mosquitoes, over 320 species of birds, at least 2 species of reptiles, and more than 25 mammalian species, in