In 1966, Heinz Sielmann sets off on his longest expedition. He spent 19 months traveling through the wilderness of North America. From the alligator swamps of the Everglades to the breeding grounds of arctic waterfowl.
2005
2021
2012
2013
2023
2017
2025
2020
1927
2006
1940
2016
1972
2014
1939