Cankerworms are sometimes called "inchworms", but note that there are many other species of inchworms. Cankerworms have feet only at the front and rear, and they move by arching their rear portion. Appearing in the spring and fall, cankerworms are the larvae of the adult moth.
Springtails are minute, wingless insects that get their name from the fact that they have an unusual locomotor organ which acts a spring to flip them into the air.