A strikingly green caterpillar about as long as my little finger was attached to a sprig of oak leaves in our yard. Knowing the caterpillar with spikes on its back was the larvae of an Io silkworm ...

Having an interest in butterflies and moths keeps me searching for caterpillars from summer till fall, and for the cocoons of moths throughout the winter. Caterpillars can be quite difficult to find ...