SPRINGTAIL
collembolan, springtail
(noun) any of numerous minute wingless primitive insects possessing a special abdominal appendage that allows the characteristic nearly perpetual springing pattern; found in soil rich in organic debris or on the surface of snow or water
Source: WordNet® 3.1
Etymology
Noun
springtail (plural springtails)
Any of various wingless hexapods, of the subclass Collembola, with spring-like legs.
Source: Wiktionary
Spring"tail`, n. (Zoöl.)
Definition: Any one of numerous species of small apterous insects belonging
to the order Thysanura. They have two elastic caudal stylets which
can be bent under the abdomen and then suddenly extended like a
spring, thus enabling them to leap to a considerable distance. See
Collembola, and Podura.
Source: Webster’s Unabridged Dictionary 1913 Edition