Die Sugthiere in Abbildungen nach der Natur /.Erlangen :Expedition des Schreber'schen sugthier- und des Esper'schen Schmetterlingswerkes [etc.,1774]-1846..biodiversitylibrary.org/page/31078316
Kenya's Mzimi Springs is a hippo spa -- but is it right to assume the hippos enjoy it? A Humanimal Doodle from award-winning children's author/illustrator Karen Romano Young www.karenromanoyoung.com
Pod of hippos in Luangwa Valley, Zambia, 2002. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation license. Image obtained from Wikimedia Commons.