I believe you meant "every cowbird"? Starlings actually parent their own young (and are very good at it!) I recall from Ted's vids....shoot the parents first, the young often stick around juuuuust long enough to get another one down, has worked for me. Cowbirds are definitely on the list as well. Once my fruit trees and bushes ripen up some native birds (caught in the act) end up on the list. My .22 S510 @ 30fpe is super overkill on the sparrows...no surviving that.
What Bird Puts Its Eggs In Other Nests Starling
chipperbirds.com
NO! I in fact said STARLING and I meant that. I have seen it done firsthand. They are not as bad as cowbirds with parasitic broodism, but they're close. At least they are in NH. Do a web search, I just did, plenty of info on it.

