I put on my rubber boots and sloshed around the Charles River Peninsula this morning. Spring has arrived: first CRP sightings of tree swallows, first song of the phoebe, and was that a female wood duck up in a tree? (Yes, checking out a cavity). There are now at least three bluebird pairs claiming boxes, though the house sparrows seem much more hazardous this year that previously. I wonder also if a flicker is going to end up claiming a box. The resident red-tailed hawk looked miserable--completely waterlogged.