Surrogate moms hatch, raise baby birds

<div class="meta image-caption"><div class="origin-logo origin-image none"><span>none</span></div><span class="caption-text">Blue and her Guineafowl chicks at Broofield Zoo in summer of 2011. (Jim Schulz&#47;Chicago Zoological Society)</span></div>
August 2, 2011 2:14:22 PM PDT