Thomas Gretler

Thomas Gretler is a biologist and nature photographer, who lives in the Allgau region in southern Germany. A guide for hiking and nature adventure tours, he also writes for a variety of German print media and publishers.

Thomas Gretler is a biologist and nature photographer, who lives in the Allgau region in southern Germany. A guide for hiking and nature adventure tours, he also writes for a variety of German print media and publishers. See less