Birds migrate to balance energy, study shows
New work published in Nature Ecology & Evolution shows that birds migrate to preserve a balance between the amount of energy they take in and the amount they expend. By analyzing the recorded movements of the 15 per cent of migrating bird species worldwide and placing the data in a virtual environment, British researchers were able to show that the birds who migrate do so to optimize their “energy budget” in the face of changing seasons and competition from other species. This is the first study to show a motivation for migration across all migratory bird species. For more information, see nature.com.