Officials have begun to examine the remains of the deceased starlings found by California Highway Patrol officers, who were called to investigate the dead birds at the Independence Lane off-ramp on Monday.
A spokesman for the California Department of Fish and Game, Andrew Hughan, indicated that the dead birds do not show signs of being shot or maliciously attacked, but that the flock may have flown into a large vehicle or trailer, although the situation is "unusual for such a large group to be killed flying into a truck."
Healdsburg is located roughly 70 miles north of San Francisco in Sonoma County, a region best known for its exceptional wine country.
In the days just prior to the new year and since, there have been a rash of massive wildlife deaths that have spanned the globe, sparking wild theories of alien contact or the coming of the end of days.
On New Year's Eve, 5,000 blackbirds fell from the sky in Arkansas. A similar event involving dead blackbirds, this time in Louisiana, occurred just days after the instance in Arkansas.
In the days that followed, other countries around the world reported instances of massive wildlife deaths. In New Zealand, Brazil and the United Kingdom, thousands of dead marine life were found washed up along shores.
Maryland's Chesapeake Bay, the largest estuary in the United States, was also the site of massive wildlife deaths, with over two million dead fish found along the shores.
While investigators working the various cases have indicated that the fish, bird and other wildlife deaths are more than likely related to environmental stresses, the magnitude and timing of these strange occurrences add mysteriousness to the whole situation.