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Discerning species

When studying living beings it is key to distinguish their species. Different animals do different things, respond in different ways and interact in different ways with their environment. By recognizing species, biologists are able to study them one by one and answer questions like: "What makes a lion so cool?", "When is a hippo too fat?" and "why do mosquitoes exist?".

So, identifying species is extremely helpful, but it can be harder than it seems. Normally species are distinguished by their physical characters, which works well on paper, but in the field a lot of animals are easily scared and thus run of, leaving you unable to see anything but their ass. Sadly relevant characters are often let out of field guides. Well, at least until now.

Therefore, during your next safari, sit back, enjoy the view and use this guide. Because now you'll know the answer to "To which species belongs this ass?".

Field guide to animal asses

Save That Ass presents: A Pocket Guide to Animal Asses of East Africa!
This comprehensive field guide helps in determining one third of East African mammals (but also some reptiles and birds)... solely by their asses.

Do all savannah critters quickly flee when you approach them?
Are you left with just a picture of their marvelous behind?
No problem!

Our pocket guide tells you in a simple and humorous way to what species those breathtaking buttocks belong.

Supporting EDGE

Our latest project, in collaboration with Stichting Godart, supports the charity organisation “Edge of Existence”. All proceeds gained by selling the field guide will go directly to their cause.

This field guide provides an accessible and informative way to discern 50 animal species of East Africa - including ⅓ of its mammals, but also some reptiles and birds - by their behinds. It includes detailed photos, a clear determination key, descriptions of the 27 taxonomic families represented, fun facts and original illustrations.

Not convinced yet? Why don’t you try our online key “Assess by Asses” as a demonstration of our way of thinking?

The field guide can be bought for just €15,99 at every Dutch and Belgian bookstore, such as Bruna, Standaard Boekhandel and Bol.com. You can also order the guide by mail at the bottom of this page. Order by mail greatly cuts costs of sales, and therefore results in a higher donation to EDGE.

Paperback, 2020, First edition, full-colour, 74 pages, ca. 30 illustrations, ISBN 978-90-8299-572-5

Who we are

We are four Dutch biologists, aiming to bring a positive spin to this world.
With humour we try to create awareness for the need for conservation efforts.

All profits gained during our efforts, including from the sale of our guides, will be put directly into their respective conservation efforts. Alternatively, you can click on the respective name of the organisation to donate directly or you can donate to our go-fund-me to enable us to do more projects in the future.

*  Whilst this is entirely true, the idea originally sprung from study evasive behaviour

Supported Projects

Here we higlight some of the projects that we think deserve more attention.

IUCN redlist

The IUCN Red List of Threatened Species is a critical indicator of the health of the world’s biodiversity – a Barometer of Life – telling us what we need to know to save wild species.


Edge of Existence

The EDGE of Existence programme is the only global conservation initiative to focus specifically on threatened species that represent a significant amount of unique evolutionary history.


Future For Nature

Future For Nature supports young, talented and ambitious conservationists committed to protecting species of wild animals and plants. The commitment of these individuals is what will make the difference for the future of nature.


Biodiversity Center

We are Naturalis Biodiversity Center. Through our impressive collection, knowledge and data, we record all life on Earth. This is important, as our future depends on biodiversity.


Save Our Species

Save Our Species is an IUCN grant-making mechanism set up to ensure the long-term survival of threatened species, their habitats and the people who depend on them.


Order a Field Guide

By using this form, you can preorder our field guide with the standard prize of €15.99. After we've manually confirmed all details, we will send a confirmation mail with a payment request. If you do not receive this confirmation within three days, please contact us at info@savethatass.org.

Delivery by PostNL costs an additional €4,- per order and is currently only available within the Netherlands.

To cancel an order, mail with the subject "cancel order" to order@savethatass.org.
By ordering via this form, you accept our terms of use and terms of delivery.

Total price