The red-breasted nuthatches completed their nest, and apparently have begun incubating eggs. Today the female remained in the nest and the male visited regularly to feed her. He also spent quite a bit of time smearing sap around the entrance to the nest (shown above). This behavior is characteristic of the red-breasted nuthatch, but several nuthatch species perform tasks that help keep their nest free of pests and parasites. For example, white-breasted nuthatches with scrape the outside of their hole with bad smelling insects to dissuade intruders.
The female will incubate the eggs for two weeks, so around May 18th the young should hatch.
This year we installed a camera on the outside of the nuthatch box, and we will stream it when things get interesting. Next year, we'll probably move that camera inside their nest box.
The chickadees are just about done with their nest construction and similar to the past, it is made mostly of squirrel fur, and some antelope hair. The female has been roosting in the nest box for the last couple of nights, and I suspect she will begin laying eggs anytime now (if she has not already). Unlike the nuthatches, we have a live streaming camera inside the nest box- click here to see what is going in inside 24/7.