Rock cavy The rock cavies belong to the subfamily Caviinae along with the guinea pig, desert cavy, and cuis. Rock cavies are found in dry, rocky areas with low, scrubby vegetation, and they like to reside close to stony mountains and hills. In appearance and habits they closely resemble the unrelated rock hyrax of Africa (an example of convergent evolution). They usually shelter in crevices. They are reportedly seen at day and night, but are most active at dawn or dusk. Animals most active at this time are known as crepuscular. Studies show that there is a direct link between the retina
Rock cavy protected areas that these animals reside in. Rock cavy The rock cavy or mocó ("Kerodon rupestris") is a cavy species endemic to eastern Brazil, from eastern Piauí state to Minas Gerais state. It has been introduced to the oceanic island of Fernando de Noronha. The rock cavy is a fairly large rodent weighing up to , and like other species of cavies the tail is vestigial or absent. The dorsum is grey and the venter light brown. They are hystricomorphs, which means they have porcupine-like jaw muscles. The rock cavy belongs to the order Rodentia and the family Caviidae. This