Easton's Bible Dictionary (1897)
” Supposed to be the Lacerta gecko or fan-foot lizard, from the toes of which poison exudes.
Smith's Bible Dictionary (1863)
(that which clings to the ground) (Heb. letaah . (Leviticus 11:30) Lizards of various kinds abound in Egypt, Palestine and Arabia. The lizard denoted by the Hebrew word is probably the fan-foot lizard (Ptyodactylus gecko) which is common in Egypt and in parts of Arabia, and perhaps is found also in Palestine. It is reddish brown spotted with white. The gecko lives on insects and worms, which it swallows whole. It derives its name from the peculiar sound which some of the species utter.
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
LIZ'ARD (that which clings to the ground). Lev 11:30. Many species of these reptiles abound in Palestine, some of which are very slow in their movements, while others run very rapidly. Some kinds are eaten by the very poor inhabitants. See Chameleon, Ferret, Mole, Snail, and cut on next page.