Here you can read article in National Geographic about the unusual reptile recently discovered in Kosovo which is among only a handful of three-tailed vertebrates known to science. This study was published in the journal Ecologica Montenegrina.
Spotted in June in the Metohija region of Kosovo, the adult blue-throated keeled lizard (Algyroides nigropunctatus) had tails that measured 30, 15, and 10 millimeters in length.
The freak individual, besides being a first known in the species, is among only a handful of triple-tailed lizards documented worldwide, according to its co-discoverer Daniel Jablonski, a biologist at Comenius University in Bratislava, Slovakia. Two-tailed specimens are more often seen—though are still relatively rare.