Jamieson, Fausset and Brown on Genesis 1:24

Ge 1:24-31. Sixth Day. A farther advance was made by the creation of terrestrial animals, all the various species of which are included in three classes: (1) cattle, the herbivorous kind capable of labor or domestication.

24. beasts of the earth--(2) wild animals, whose ravenous natures were then kept in check, and (3) all the various forms of creeping things--from the huge reptiles to the insignificant caterpillars.