Genevieve Warner, of the Middleburg Humane Society in Marshall, Va., holds out a dollar bill for “Max,” a yellow-naped Amazon parrot, to take from her hand during the “Flite Zone” program at the National Aviary in Pittsburgh, Thursday, April 29, 2010. Warner is one of the zoo trainers and professional animal handlers from across the United States, Canada and the U.K. attending the Animal Behavior Management Alliance conference in Pittsburgh this week. The bird took the bill and placed it in a collection bin for donations for conservation projects. (AP Photo/Keith Srakocic)