White-cheeked Gibbon (John Greg Jr) Tags: usa animals zoo pittsburgh unitedstates pennsylvania mammals primates whitecheekedgibbon pittsburghzooppgaquarium camera:make=nikoncorporation exif:make=nikoncorporation exif:focallength=300mm exif:aperture=56 camera:model=nikond7100 exif:model=nikond7100 exif:lens=1803000mmf3556 exif:isospeed=6400