Birds can do Math

Pigeons can learn abstract numerical rules, a skill that scientists had believed only primates possessed. Although the birds may not be able to do higher math, their ability to reason numerically is likely something that a wide variety of species can do, too, researchers say.

Full story at http://news.sciencemag.org/sciencenow/2011/12/no-joke-pigeons-ace-a-simple-math.html