What are the thin, oval disks caught in the cobweb above the cavity of this sugar maple tree?
Answer
Those are cutouts from sugar maple leaves created by maple leafcutter caterpillars. The caterpillars use these disks, glued together, as a mobile home as they move around the leaf in late summer, feeding on other portions of the leaf. At least in some parts of Vermont, maple leafcutter populations were very high this year. Read more about maple leaf cutters here.

This week’s contest winner was Lindsay Putnam