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House Sparrows (Passer domesticus) are one of the most adaptable and prolific birds on Earth. They are found wherever there is human activity and have even learned to use the very buildings that house people for shelter and food. Unfortunately, their opportunistic nature has also resulted in the species becoming a nuisance to other more native species. In the United States, for example, the abundance of sparrows is causing a decline in Bluebirds and Purple Martins. Originally introduced to the Americas by European colonists, sparrows have become one of