I had a beautiful walk at the Great Meadows National Wildlife Refuge in Concord, MA. As I enter the trailhead there is a blackboard (not blackbird..) where visitors can chronicle the birds and mammals and reptiles they have seen on their visit; on the list were river otters, muskrats, ducks, geese, Grebes, snakes, hatched eggs. 

There were dozens of Red-winged Blackbirds at the edges of the marsh. Flying up and catching insects in midair, quite unafraid of my walking by. I now know the song of this bird- it was like a blackbird symphony. The call is like a yodel and a harsh trill.

To hear the song of the red-winged blackbird, click here.