Winter observation of nests. 2017

This one of five photos I captured on Jan. 23, 2017. The camera shutter isn't opening completely as seen by the dark edges on top and side.
This nest appeared to be a sack hanging from branches, in the tree on the East side of our property.  It is also home to woodpeckers which have their nest in the tree trunk.

A squirrels nest appears large and secure on limb of trees.

In the common Lilac bush which is taller than I am.  Nest seems large but may be home to robins.