Due to storm damage we were not able to enter the woods to view the mist nets, so the banding was done at the main station area. Prior to banding the owls there was a great presentation by the Drumlin staff / banding team on their decade of data with these little owls. Tons of information about their migrations & movements, and also about their ecology & breeding behaviors.
It seems most of the birds caught are first year birds, with some second year birds intermittently. Unlike most owls species who have 2ish young, saw whet's have a number of young. They are more like song birds in that they have larger egg clutches due to high mortality rates. Which, when you see how small these little owls are it is easy to guess that lots of other critters... eat them.
checking age of bird.
Here is the Breeding birds atlas II chart for Saw Whet's in Mass, dark green being confirmed breeding blocks.
Weight & size shows the difference from the female to the lighter & smaller male.
peering at the captor
First year birds can be identified by all new feathers on the wings, as second year birds & on ( 2+ years and older ) begin to replace their various primary & secondary feathers, thus showing a light to dark color difference between the old & new feathers.
An amazing night banding over 12 + owls, and some awesome pictures by Casey.