Nightstalker
Appearances: Fallout: New Vegas
What are Nightstalkers? Big MT didn’t just conduct research on toxic toxins, they also experimented on animals before the war. The researcher Dr. Borous created a new being from the genes of a rattlesnake and a coyote. The Nightstalker was born.
The creature has the body of a coyote, but the head of a rattlesnake. The body consists of fur and scales and, naturally, the creature is also poisonous. Additionally, they can reproduce and lay eggs. Some Nightstalkers can even become invisible due to the experiments conducted by BIG MT.
A single Nightstalker should not pose a problem in the wasteland. However, they usually hunt at night and in packs, which can quickly put you in a tough spot. If you are in narrow mountains or caves, you should listen for sounds of snakes and coyotes.