We are fortunate to have a variety of raptors nest on our urban landscape. Some of the most visible are osprey. Osprey feed almost entirely on fish. Along with peregrine falcons and bald eagles, osprey populations were virtually wiped out by the impacts of DDT during the 1950s and 60s. Over the past four decades, they have made an amazing comeback. They build huge nests (over the years they can grow to weigh more than 1000 pounds) in old snags or on man-made structures such as pilings and utility posts. Osprey are migratory, and typically return to the metro area right around March 20th. Over the last week we have been receiving tons of calls from people seeing osprey show up at various sites along the river. The amazing picture above was taken by Tom Nelson last year at Oaks Bottom where a pair of osprey and a pair of red tails dueled for several days over a nest site atop a utility tower.