Steph, I was totally unaware there was a cowbird nest in the mesquite tree in my yard. Twice this past week when I went out with my puppy the birds made a terrible racket when my puppy discovered a new fledgling hopping around my yard. I was able to retrieve it each time and pop it over into my neighbor's yard. (Neighbor is on vacation and I knew ithey would be safe until the got their wings.) Talk about a village to raise a child, I have never seen so many birds flying and acting distressed over one little baby.