The Shope papilloma virus can cause rabbits to grow horns. This may have been the source of myths such as the Wolpertinger and the Jackalope. See also
Wart
Actinic keratosis
Epidermodysplasia verruciformis
List of cutaneous conditions

References
Further reading
Matthew Moore (2007-11-12). "Tree man who grew roots may be cured". London: Daily Telegraph. Archived from the original on 2007-11-13. Retrieved 2007-11-14. "Images of cutaneous horns". DermAtlas. Archived from the original on 2003-04-19. Retrieved 2007-11-14. DiClaudio, Dennis (2006) "The Hypochondriacs Pocket Guide to Horrible Diseases You Probably Already Have", Bloomsbury Publishing, ISBN 978-1-59691-061-4


== External links ==
Necrophilia has been documented in various lizard species, including  Ameiva ameiva, the leopard lizard, and Holbrookia maculata. There are two reports of necrophilic behaviour in the sleepy lizard (Tiliqua rugosa). In one, the partner of a male lizard got caught in fencing wire and died. The male continued to display courtship behaviour towards his partner two days after her death. This lizards necrophilia was believed to stem from its strong monogamous bond. In one study of black and white tegu lizards, two different males were observed attempting to court and copulate with a single female corpse on two consecutive days. On the first day, the corpse was freshly dead, but by the second day it was bloating and emitting a strong putrid odor. The researcher attributed the behaviour to sex pheromones still acting on the carcass.Male garter snakes often copulate with dead females. One case has been reported in the Bothrops jararaca snake with a dead South American rattlesnake. The prairie rattlesnake (Crotalus viridis) and Helicops carinicauda snake have both been seen attempting to mate with decapitated females, presumably attracted by still-active sex pheromones. Male crayfish sometimes copulate with dead crayfish of either sex, and in one observation with a dead crayfish of a different species.In anurans, it has been observed in the foothill yellow-legged frog, the yellow fire-bellied toad, the common frog, the Oregon spotted frog, the common Asian Toad, Dendropsophus columbianus, and Rhinella jimi.