Many other animals, such as large rodents called hutias
(Capromyidae) that still survive on some Caribbean islands today, probably colonised the region in the same way.
Five families were united in Octodontoidea, with Abrocomidae (chinchilla rats) sister to two family dyads: Octodontidae (degus and viscacha rats) + Ctenomyidae (tuco-tucos) and Echimyidae (spiny rats, tree rats, and the nutria) + Capromyidae (hutias
Small islands had coastlines rich with fish, and the absence of dense woodlands made them more suited to farming and hunting small prey such as iguanas, tortoises and hutias
, a cat-sized rodent.
But, looking over two decades of captive breeding, only a handful of animals owe their survival to captive breeding--red wolves, Jamaican hutias
, Micronesian kingfishers, Guam rails, black-footed ferrets, Pare David's deer, Arabian oryx, golden lion tamarins, California condors and a few others.
There were 12 species of insectivores, 18 of sloth (both terrestrial and arboreal), and between four and seven simians, and more than 55 rodents, mainly hutias
(Capromys and related genera).