ecosystems? USGS scientists are studying these processes and impacts. The U.S. Geological Survey research looked at one of the world's largest populations of long-tail ducks and found that hundreds of thousands of these elusive birds engage in a bizarre 30-50 mile morning commute from Nantucket Sound to the Atlantic Ocean, returning each evening. USGS is working in collaboration with numerous state and federal agencies and tribes to obtain approval for field trials with vaccine-laden, peanut-butter flavored baits and evaluate the safety and effectiveness of the vaccine in grasslands.