Native to North America and our national symbol, the Bald eagle's wingspan can reach over 7 feet. Primarily fish eaters, they will also eat other birds and rodents.. Even though they are migratory birds, they will stay in one location if they have access to the ocean or a lake as long as there is adequate food and nesting trees. Once on the brink of extinction with only 800 pairs, they have been increasing steadily, now with close to 3000 breeding pairs.