In the case of Ouroboros, pit vipers.

- Most ofthem are pit vipers. - Oh, that's terrific, Doctor.

We caught another Asian pit viper. I t's a mean bastard too.

Why would the homeless man under my care be raving about pit vipers?

The snake I brought here from your lab was able to mate with an indigenous pit viper.

- Oh. You can tell these two pit vipers that this is the last one of these... ...I'll be doing for a while.

Now we've sent a coyote after the ferret. You've had a pit viper and a ferret under your stage since Tuesday?