It covers the details to the taxonomy, range, habitat, reproduction, behaviour, and conservation status of 798 species from 27 families in two orders. The 60 colour plates are created by Toni Llobet. The sixth volume is devoted to the lagomorphs and 25 families of rodents, including the hares, pikas, chinchillas, the Laotian rock rat (a living fossil), the capybara (the largest extant rodent), and the diverse group of squirrels. But due to the large number of described rodents Lynx Edicions organized a survey from summer to autumn 2015 in which a majority of customers decided in favor of two volumes. Initially it was intended to publish only one volume on lagomorphs and rodents. ISBN 978-84-9 Volume 6: Lagomorphs and Rodents I (published in July 2016)
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