Piikkisiat

Piikkisiat are nocturnal rodents characterized by their sharp quills, which serve as a primary defense mechanism. These quills are modified hairs, typically hollow and brittle, and are not barbed like those of a porcupine, though they can detach easily upon contact. Two families are recognized: the Old World porcupines (Hystricidae) and the New World porcupines (Erethizontidae). Despite their similar appearance and defensive strategy, they are not closely related.

Old World porcupines are found in Africa, Asia, and Southern Europe. They are generally larger and more robust, with quills covering their entire body. When threatened, they may raise their quills, rattle them, and charge backward into predators. Their diet consists mainly of roots, bark, fruits, and other vegetation.

New World porcupines inhabit North and South America. They are typically smaller and have longer, more flexible quills, often with barbs that make them difficult to remove. Many species are arboreal, meaning they live in trees, and possess prehensile tails for gripping branches. Their diet is also herbivorous, including leaves, twigs, and fruits.

Piikkisiat are generally solitary animals, though they may form family groups. Breeding seasons vary depending on the species and geographic location. Females typically give birth to one or two offspring after a gestation period that can range from several weeks to several months. The young are born with soft quills that harden within a few days. Their lifespan can range from a few years to over twenty years in captivity, depending on the species.