The Global Mammal Parasite Database is a compilation of records of parasites and their hosts that have been documented in the published scientific literature. As the quote above suggests, mammals are an extremely well-studied group of animals, and there are thousands of published reports and scientific studies describing their parasites and the abundance of parasites in wild populations.
We have systematically searched the literature on mammalian parasites to produce three primary databases covering primates, carnivores and terrestrial hooved mammals (which includes all perissodactyls and artiodactyls). All of the entries in this database come from wild populations. In the future we will be expanding out taxonomic coverage to other groups of mammals.