These small creatures have just flown more than 1,850 miles (3,000 kilometers), all the way from Central America. Other birds undertake even longer journeys — the Swainson’s thrush, for example, nests ...

Birds are messy eaters, scattering shells and debris all over creating an all-you-can-eat buffet for ground-feeding squirrels. Squirrels have great memories and once this easy food source is ...