Grzimek's Animal Life Encyclopedia

It is named after its original editor in chief, Bernhard Grzimek (pronounced [ˈɡʒɪmɛk]).

The encyclopedia was an international collaboration by a large number of scientists including Theodor Haltenorth, Wolfgang Gewalt, Heinz-Georg Klös, Konrad Lorenz, Heinz Heck, Lutz Heck, Jean Dorst, Constantine Walter Benson, Irenäus Eibl-Eibesfeldt, Helmut Sick, Heini Hediger, Wolfgang Makatsch, Erich Thenius, Erna Mohr, Adolf Portmann, Nagamichi Kuroda, Lester L. Short, Gerlof Fokko Mees, and Andrew John Berger.

The German edition also published three supplementary volumes: Entwicklungsgeschichte der Lebewesen (History of Life), Verhaltensforschung (Behavioural Research) and Unsere Umwelt als Lebensraum - Ökologie (Our Environment as Living Space - Ecology).

In fall 2009, Gale Cengage released a web-based version of the encyclopedia, with access to the web site by subscription.

The site allows users to rate articles and to submit videos and photography.