Imperiled Cat Signature Project The Lindner Center for Conservation and Research of Endangered Wildlife’s (CREW) world-renowned scientists form critical partnerships with other leading conservationists and governmental and non-governmental organizations to achieve CREW’s mission to Save Species with Science®. Of the 37 wild cat species in the world, 28 are small in size, weighing less than 50 lbs. Many of these small cats are threatened with extinction in the wild but have received little conservation attention compared to the larger cats. The Association of Zoos & Aquariums (AZA) has established breeding management programs for several small cat species including the ocelot, fishing cat, Pallas’ cat, black-footed cat, and sand cat. Concerted, collaborative efforts of zoos and other conservation organizations will be necessary if small cats are to survive and thrive in both the wild and in zoos. As a global leader in cat conservation, the Cincinnati Zoo maintains a diverse felid population, including all five of the above-mentioned small cat species. CREW scientists study the reproductive biology of all five small cat species to optimize zoo propagation and develop assisted reproductive technologies for population management. CREW uses tools such as fecal hormone analysis and semen collection to characterize basal reproductive traits in small cats and improve breeding success. This basic reproductive knowledge also is applied in developing techniques such as sperm and embryo freezing, in vitro fertilization, embryo transfer and artificial insemination to produce viable offspring.