Hummingbirds found able to understand numerical order

[PhysOrg]

A team of researchers from the University of St Andrews in the U.K. and the University of Lethbridge in Canada has found that hummingbirds are able to understand the concept of numerical order. In their paper published in Proceedings of the Royal Society B, the group describes experiments they conducted with wild hummingbirds and what they learned from them.

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