One correction; Brown-headed Cowbirds are native to the west and central US. Their range expanded into the east. They are just far more numerous in CA than they were before.
My video just focuses only on Califonia and not the west in general. While the range of brown-headed cowbird has expanded to CA, they are not true natives and are consided invasive in California. Please see CDFW's page on the cowbird. wildlife.ca.gov/Conservation/Invasives/Species/Cowbird
One correction; Brown-headed Cowbirds are native to the west and central US. Their range expanded into the east. They are just far more numerous in CA than they were before.
My video just focuses only on Califonia and not the west in general. While the range of brown-headed cowbird has expanded to CA, they are not true natives and are consided invasive in California. Please see CDFW's page on the cowbird.
wildlife.ca.gov/Conservation/Invasives/Species/Cowbird