- "Your food couldn't sustain us, but that's why we brought her. The cow would help the last of our people survive for another hundred years."
- ―Eek Stack Ik Ik to Peacemaker[src]
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The 'cows' are a species of extraterrestrial from an unknown planet who produce the butterflies' sole food supply. After Eek Stack Ik Ik and her species traveled to earth she had one member of the species transported via teleportation technology to earth before being placed underneath the Coverdale Ranch to hide its location. The cow eventually had its location discovered and broken into by the 11th Street Kids and was killed after Leota Adebayo launched into its body with Peacemaker's "Human Torpedo" helmet, killing it.
Cows are massive insect-like aliens with traits similar to grubs and spiders. They have several short, stubby legs tipped with claws, six large black eyes and a small mouth with a single tooth. Cows create a nectar in their bodies that can be extracted similar to milking an earth cow but the exact process is a mystery.
Nothing is known about the cows' behavior, but unlike the butterflies they can survive without the need for an extraterrestrial food source. It is unknown if the cows gain any benefit from feeding the butterflies, but butterflies rely on the cows' nectar to survive and will starve after only a few weeks without a constant supply.