Ocells
What makes some animals more intelligent than others?
Ever since Darwin, scientists have suspected that the intelligence of an animal has something to do with the size of its brain. The encephalisation theory, for example, argues that the "extra" brain tissue of a larger brain allows more neurons to be devoted to cognitive tasks. However, until now there was no scientific evidence to support this theory, partly owing to the difficulties of quantifying neuron numbers for a large number of species.
Climate change affects birds in Europe and North-America differently than in the Mediterranean, and could expose them to a climate trap
The behavior of bird communities in Europe and in the United States and Canada due to climate change is different than in the Mediterranean area. It changes faster in winter, when they migrate, than in spring, when they nest.