We are pleased to have received this email and awesome photo from Michael Schwartze.
The photograph is of a male adder from "my" translocation project at the Dortmund-Ems-Kanal close to Münster.
The canal was enlarged, so we caught them in 2009 to put them into a big outdoor enclosure.
From 2012 to 2014 we put them back to their origin habitat.
Now we monitor them and this is one of these individuals.
We take pictures of their head markings to be able to recognize each of them.
This year a student of the university of Munster will investigate them in order to pass an exam (bachelor).
Thank you for your assistance and quality products!