A clubtail that replaces Gomphus vulgatissimus in Turkey and the southern Balkans. It is very similar but smaller and more slender. In mature individuals, the eyes are blue instead of greenish, and the thorax of the males is more yellow instead of the greenish colour mature males of G. vulgatissimus gets with some age. Its larger yellow markings give it a rather distinctive appearance. Small yellow spots are present also on S8-S9. Typically mature males have all back legs without yellow stripes, however exceptions exist. Antehumeral stripes are light in colour and as wide as the adjacent black bands.
Gomphus schneiderii is not uncommon in the Peloponnese but is rare in the rest of continental Greece, the Greek islands (Corfu, Evia, Lesbos and Samos) and the European part of Turkey. Its distribution in the north of Greece, where it meets G. vulgatissimus is difficult due to the occurence of intermediates, making many records unreliable. The species has been recorded from Albania, Montenegro, Macedonia and southern Bosnia and Herzegovina but these countries lie in the region where G. schneiderii and G. vulgatissimus meet and identification often problematic. The current known distribution suggests that G. schneiderii is restricted to the warmer lower parts of the Balkan Peninsula with G. vulgatissimus replacing it in climatologically less suitable areas.
Gomphus schneiderii is mainly found on slow rivers and streams with sandy or silty bottom. Occasionally it breeds in ponded backwaters fed with ground water, or in large lakes where wave motion produces conditions similar to those found in running waters. In most cases its habitats are bordered by forest, bushes, hedges or extensive hay production meadows.