This page offers an overview of the stories, articles and brief notices that Jaroslav Hašek wrote, or is thought to have written, for the fortnightly journal Svět zvířat (The Animal World). As pseudonyms were widely used and shorter items were usually unsigned, the degree of certainty varies: some pieces can be attributed to him with confidence, while others remain doubtful or are not his.

Stories signed with his own name or with known pseudonyms are shown in a larger type. Items he did not write, or may only have translated, are struck through and marked "reject". Most of the contributions attributed to him are unsigned, however, so the level of confidence ranges from "possible" and "probable" to "high" (in practice, virtually certain).

Because a substantial part of the material published in the magazine was translated from other languages, mainly German, one must assume that much of the content in the years 1909 and 1910 was translated by Hašek. This is particularly likely during the summer of 1909, when the magazine's owner and editor-in-chief, Václav Fuchs, was away and left it to his deputy to manage the enterprise.

Jaroslav Hašek edited the magazine from around February 1909 until October 1910, but had contributed to it already from December 1908. In December 1912 he was re-employed as editor, but left again around May 1913.