Of the nearly 10,000 species of birds, about 19% (1,850 species) are considered to be migratory. While there are a few species that traverse long distances, the 13-15 inch, 3.5 ounce Arctic Tern takes the prize for the longest migration. Just how far do they fly? Try an astounding 44,000 miles (71,000 km) annually on average. Thanks to recent technological […]