Birds Pay Attention to Speed Limits Too images.nationalgeographic.com/wpf/media-live/photos/000/705/cache/birds-follow-road-speed-limits_70566_600x450.jpg A griffon vulture soars over a road in Spain. Birds might be learning to adjust to traffic speed limits. August 21, 2013 http://news.nationalgeographic.com/news/2013/08/130821-birds-road-speed-limit-traffic-evolution-animals/ [with comments]