Lio, a male chimpanzee, eats inside his enclosure at the Chapultepec Zoo in Mexico City, Thursday March 10, 2011. Lio is expected to mate with Aby and Kenia, not shown, during a five-year &#34;reproductive loan&#34; from the Wameru Zoo Park in Mexico&#39;s Queretaro state. &#40;AP Photo&#47;Marco Ugarte&#41; <span class=meta>(AP Photo&#47; Marco Ugarte)</span>