Lizards

The ring necked lizard of the Arizona deserts is not a mere devourer of weaklings. He is always ready to fight, whether he is challenged by another or cornered by a man. When brought to bay in some hole, he opens his jaws and dashes bravely out, snapping at everything which opposes him, and so fierce and sudden is his rush that it is impossible to face it without flinching. By holding two of these lizards loosely by the small of the back and allowing their heads to clash as they struggle to escape, one may be able to induce combats such as must occur every day in the desperate lizard world.

Forgetting that they were captives, they would seize upon each other and vent their thwarted rage to the utmost in a fight which, but for timely interference, would doubtless lead to the death of one or the other. Such bull dog pugnacity is rather unlooked for in lizards, but a student of character could easily read in the set jaw and pouched throat of this species the signs of fighting blood. - Country Life in America