Whenever its prey breathes out, the boa wraps tighter. After the prey has been constricted, the boa eats it whole. Boas eat mice and rats, and occasionally a small deer. To eat bigger things like deer they stretch their mouth very wide by unhinging their jaws . It can take several weeks for the boa to fully digest its food.
Boa constrictors vary in color from brown to gray.
Boas use heat pits to sense their surroundings because they have very bad eyesight.