Hornery

Hornery refers to the growth of horny projections from the skin of an animal. These are typically made of keratin, the same protein found in hair and nails. Hornery can manifest in various forms, including true horns, antlers, and ossicones. True horns, found in animals like cattle and goats, have a bony core covered by a keratin sheath and are permanent. Antlers, characteristic of deer species, are also bony but are shed and regrown annually. Ossicones, seen in giraffes, are bony structures that fuse to the skull.

The development of hornery is influenced by genetics and hormones, often playing a role in sexual selection, defense, and social dominance. The size and shape of horns can vary significantly between species and even within a species, depending on factors like age, sex, and environmental conditions. In some cases, hornery can also refer to the formation of keratinous growths in non-standard locations on an animal's body, which may be due to injury, disease, or genetic mutations. These abnormal growths can sometimes be mistaken for true horns or other specialized structures.