The dik-dik is named after the distinctive alarm call of the females, so the species has only itself to blame for its giggle-inducing name. But that's just one of the many charms of this pint-sized African antelope. Weighing six pounds at the very heaviest, they were destined to break the cute scale based on looks alone. But it turns out that dik-diks are also adorably monogamous—a rare trait in the natural world. Biologists believe these animals prefer monogamy because it is too dangerous for such a small herbivore to seek out new mates in other communities. So for those who don't have a romantic Valentine's Day dinner lined up, take a hint from the dik-dik and be relieved that you're not on the menu.