Neurons in the Endbrain of Numerically Naive Crows Spontaneously Encode Visual Numerosity

Endowed with an elaborate cerebral cortex, humans and other primates can assess the number of items in a set, or numerosity, from birth on [1Izard V. Sann C. Spelke E.S. Streri A. Newborn infants perceive abstract numbers.Proc. Natl. Acad. Sci. USA. 2009; 106: 10382-10385Crossref PubMed Scopus (441) Google Scholar] and without being trained [2Wilson M.L. Hauser M.D. Wrangham R.W. Does participation in intergroup conflict depend on numerical...