Rico (dog)
Rico (December 13, 1994 – 2008) was a border collie dog who made the news after being studied by animal psychologist Juliane Kaminski from the Max Planck Institute for Evolutionary Anthropology in Leipzig after his owners reported that he understood more than 200 simple words. Kaminski wrote in Science that these claims were justified: Rico retrieved an average of 37 (out of 40) items correctly. Rico could also remember items' names for four weeks after his last exposure.
Read more about Rico (dog): Testing and Results, Implications