San Diego is one of the most biologically rich counties in the United States, sheltering more endangered plants and animals than any other county in the nation. In fact, three national wildlife preserves border the southern end of San Diego Bay and another refuge sits just a few miles off the coast, making it of the best places in the entire state to bird watch or simply get back to nature.

These tours are a perfect way to experience the diverse businesses and museums that make San Diego so welcoming to all who visit.

With some of the best birding in the country, birders from around the globe flock to San Diego. Here's a list of favorite spots to see feathered friends along the coast, inland foothills, canyons, mountains and deserts.