In her newest book, Sparrow, science author Kim Todd explores the complex history, biology, and literary tradition of the sparrow. From the Sparrow War of the late 1800s in the United States (a battle over the sparrow’s introduction which climaxed at Boston Common), to the recent mysterious decline of house sparrows globally, the sparrow has been at the center of the invasive species debate for over 150 years. Kim will appear at The Harvard Museum of Natural History, 26 Oxford Street, Cambridge, on Saturday, August 4, at 12 noon. For directions and parking information, visit www.hmnh.harvard.edu. Regular admission rates apply. Free for members.