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.
2019
1977
2014
2008
2017
1989
1952
2011
2021
1958
2018
1995
2004
2010
1999