Using gland regions on their heads, warthogs mark poles and other objects for self-orientation. Males often mark during the mating season. The male also sprays urine when searching for and inspecting sleeping cavities.
Germany
Documentary
9 minutes
1988
Reinhard Radke
Institut für den wissenschaftlichen Film (IWF),
Freie Universität Berlin

1900
5.2

1899
4.6
1982
0.0

2008
5.5
1941
5.0

2018
10.0

2024
0.0
1975
0.0

1899
3.0

1899
5.6

1896
5.4
1897
3.2

1897
4.2

1897
5.6

2023
0.0
1897
5.3

1965
4.6

1897
5.0

1897
5.3

1896
4.8