Wikipedia:WikiUnicorn

A WikiUnicorn is an extinct type of WikiFauna that resembled a horse with a single horn protruding from its forehead. It is widely believed to be fictitious, but may have existed at some point in history. Many Wikipedians insist that they've seen it, but as there is no concrete evidence for their existence, it is only logical to assume that they are just seeing a one-horned goat or something.

The legend of the WikiUnicorn
It is believed that the legend of the WikiUnicorn had its origins back in the earliest days of WikiLand, when a group of WikiGnomes and WikiFairies allegedly gathered around by a campfire and told stories to one another. One of the WikiGnomes made up the story of the WikiUnicorn. The story was found perfectly preserved in the realm of forgotten pages. It told the legend of a winged WikiUnicorn who fought against the ungodly WikiFerocious Seal clan, who would capture other WikiUnicorns, throw them into their underground dungeon and torture them.

Population
No WikiUnicorns exist right now. This may be because—just like real-life unicorns—they only respond to and can be captured by young virgin girls.