Today is World Migratory Bird Day, a day to recognize the billions of birds that migrate seasonally. Facing ever increasing hazards due to loss of habitat, climate change and toxins, it is important to recognize that migrating species are exposed to risks in each of the many environments they must navigate as part of their life cycle. It is for this reason, that conservation must be coordinated internationally. The following photos illustrate a few of the migrating species, that add so much wonder and beauty to our world.