Researchers from the CRCA-CBI Toulouse have just demonstrated that bees not only can discriminate quantities relatively (one presenting more or less elements than the other) but also with an absolute representation of numbers.
This work, published in Biology Letters, shows that honeybees are capable to identify numbers independently of any relative comparison (more/less). The bees' sense of number seems consequently to parallel the Human's one, suggesting widespread numerical competence in animals and independent emergence of the sense of number in different branches of species evolution.
Bortot M, Agrillo C, Avarguès-Weber A, Bisazza A, Miletto Petrazzini ME, Giurfa M.
Biol Lett. 2019 Jun 28;15(6):20190138. doi: 10.1098/rsbl.2019.0138. Epub 2019 Jun 1