We've had them return here too. We put up a bunch of water and sediment control basins (small earthen dams) to trap sediment and runoff water in farm fields last fall and they are all full of water and FULL of birds. Trumpeters, ducks and geese are thick!
Saw my first pair of cranes last night flying over the house. Also saw a flock of snows on Friday. Ahhhh, a guy can really get used to this spring weather
But seriously, how long till fall