A satellite view of Baltimore, Maryland, would show plenty of abandoned buildings and parking lots, with parks—such as Patterson and Gwynns Falls parks—scattered throughout. However, while there is an abundance of concrete and asphalt within the city limits, Baltimore is not a city in isolation. Like Washington, D.C. and other nearby urban areas, Baltimore lies within the Chesapeake Bay watershed.
Tim Birkhead explains what song bird research can contribute to human health, Surprising Science describes the evolution of a feline’s roar (or meow), a Geophysical Research Letters study assesses the world’s dwindling groundwater supply, Nature News interviews Gabriela Chavarria—the U.S. Fish and Wildlife Service’s top science adviser—and Chris Palmer’s book reveals faking in nature videos. Here are stories in ecology from the last week in September.