Wild birds that are more clever than others at foraging for food  have different levels of a neurotransmitter receptor that has been linked with intelligence in humans, according to a study led by McGill University researchers.  The findings could provide insight into the evolutionary mechanisms affecting cognitive traits in a range of animals.

The study, published in Science Advances, was conducted by McGill biologists Jean-Nicolas Audet and Louis Lefebvre, in collaboration with researchers from Duke and Harvard universities.

Barbados birds