House Sparrows are Old World Sparrows or "true" sparrows which were introduced to the United States about 150 years ago. New World Sparrows (like Song Sparrows, Chipping Sparrows, etc) are biologically distinct and indigenous to the U.S. I'll include House Sparrows with the New World Sparrows for the sake of convenience. When I want to find them, I go to their natural habitat--my local strip mall parking lot. And just so you know, photographing birds there is much more dangerous than going to a wildlife refuge. In a FL refuge, you only have to deal with alligators, snakes, and an occasional bobcat. In a parking lot, you have to deal with cars and drivers.