They have often been described as constrictors , although there is no good evidence for this .
Their diet is made up mainly of lizards and the young of other snakes , as well as small rodents , especially young still in the nest .
young have often been described as constrictors , although there is no good evidence for this .
Their diet is made up mainly of lizards and the young of other snakes , as well as small rodents , especially young still in the nest .