Exhibit of photographs of the German orthopterists Otto and Dagmar von Helversen. If you’re interested in their bibliographies, you can find them in PDF form here: Otto and Dagmar.
Submitted by their daughter, Bettina, photographers, Marco Tschapka and Klaus-Gerhard Heller, and colleague, Brigitte Gottsberger
Otto von Helversen, 2008 (photo by Bettina von Helversen)
Dagmar von Helversen, 1997 (photo by Bettina von Helversen)
In the Grdelica-Gorge in Southern Serbia, 1981 (photo by Klaus-Gerhard Heller)
In the Vernon-Mountains in Northern Greece, Aug 11, 1988 taking pictures of Poecilimon (photo by Klaus-Gerhard Heller)
In Costa Rica, La Selva, 1994/1995 (photo by Marco Tschapka)
In Costa Rica, Rara Avis, 1994/1995 (photo by Marco Tschapka)