These oddly-named African antelopes pair up to reproduce one offspring at a time. Once an additional offspring is born, the parent dik-diks chase the older sibling off of the territory. Which is for the best, because a grown-up dik-dik won't be able to pair up if it's still living in its parents' basement.
French angelfish couples are a true team. In fact, they team up with each other to vigorously defend their territory from other neighboring couples. So it's safe to say you won't see four angelfish out on a double date.
Unlike the many insect colonies that have just a queen, some termites have a queen and king that are lifelong partners. Even if the termites aren't celebrating their fifth anniversary, we recommend you still give them the gift of wood.
Most rodents are known for being promiscuous, but not prairie voles. In fact, these vole pairs maintain nearly continuous contact with each other. No word on if the other animals on the prairie find this PDA adorable or simply annoying.
Most wolf packs are actually a nuclear family consisting of a mated pair and their offspring. In fact, there have been zero reported instances of a male wolf leaving the pack to "go out for cigarettes" and never coming back.
After black vultures consummate their relationship and the female lays an egg, both the male and female black vultures take turns incubating the egg in 24-hour shifts. Which begs the question, why can't human males and females take turns being pregnant?
When seahorses pair up, the female deposits her eggs in the male's pouch, meaning the male is actually the one who gives birth. But we're guessing the female gives birth in the seahorse version of Junior.