Scientists at the Cornell Lab of Ornithology for the first time, have documented migratory movements of bird populations spanning the entire year.
The study contains 118 species throughout the Western Hemisphere, demonstrated by animated maps showing patterns of movement across the annual cycle.
Each dot in the map represents a single bird species and the location represents the average of the population for each day of the year.
Take a look to which species is which.
Lead author Frank La Sorte, a research associate at the Cornell Lab, said:
“We used millions of observations from the eBird citizen-science database. After tracing the migration routes of all these species and comparing them, we concluded that a combination of geographic features and broad-scale atmospheric conditions influence the choice of routes used during spring and fall migration.”
The results of these analyses were published in the Proceedings of the Royal Society B.