The Swiss natural historian Johann Amman came to Russia in 1733 to take a position as professor of botany and natural history at the St. Petersburg Academy of Sciences. As part of the job, he corresponded, and exchanged plant specimens, with the English merchant collector Peter Collinson in London, and the Swedish scholar Carolus Linnaeus, among others. After briefly reviewing Amman's correspondence with these scholars and the growing commerce in exotic specimens of natural history, I explore how encyclopedias came to (...) facilitate the exchange of zoological specimens in particular. I argue that, during the seventeenth century, a new genre of zoological encyclopedias appeared on the scene whose design was particularly well-suited for the purposes of identification, a key practice in long-distance exchanges. (shrink)