November 3: Annual Connecticut Audubon outing to Northbridge, Massachusetts. Six Northern Saw-whet Owls, all females, were banded between 7:30 and 9:00 PM. Sex is determined by weight and length of the outermost primary feather. Females are larger. The age of the bird is determined by the homogenicity of the feather color, as this species does not molt all of its primaries at the same time. All fresh feathers of the same brown shade indicate a hatch-year bird. Two different shades indicate a second-year bird, and more than two shades indicate a still older bird. One of the owls had a band from Allentown, PA from a prior year.