Monday, May 23, 2011
At the Birdfeeder
Ah, we have a new visitor, the Brown-headed Cowbird. This bird is really interesting as it is one of the few birds that does not build its own nest but instead uses other bird's nests. And, it leaves its eggs for the other birds to foster. Imagine that! Oftentimes, the "foster" parent doesn't recognize the cowbird's eggs as being different than its own or is unable to "roll" the eggs out of their nest. So, the foster is facing with risking its own eggs to raise the cowbird's. And, the cowbird produces many more eggs than a typical bird with many partners versus having just one mate.