Population data for European mountain birds have been for the first time combined in a recent study, with worrying results: the abundances of mountain-specialist birds has declined by as much as 10% in the 2000s.
Urban hummingbird feeders are highly prevalent. Researchers want to understand the health implications for birds congregating and sharing food resources at these bird buffets. Data from a new study using RFID technology is one piece of that puzzle.
New research suggests that populations of the Northern Cardinal -- one of the most ubiquitous backyard birds in the United States -- are undergoing speciation in two adjacent deserts. This study, which analyzed genetics and vocal behavior, gives clues about the early steps in bird speciation.