Orangutans of The Camp Leakey Study Area
Adult males - the "kings":
Tom, Kusasi, Yayat, Pola, Adik, Ralph

When I first arrived at Camp Leakey, three ex-captive sub-adult males were present:
Pola, Yayat, and Kusasi. Over time, starting with Pola, each, in turn, grew cheekpads and became the dominant adult male. Before them, several wild cheekpadders visited
the Camp for food and females.

TOM, now the apparent king of Camp Leakey, following a fight in which he defeated KUSASI, is the eldest son of TUTUT, so is the first of the "native born" of Camp Leakey to take over as the dominant male. Like YAYAT before him, KUSASI still comes to the Camp, but avoids contact with TOM.

1991

1994

1996

1998

2005

2006

KUSASI, for many years, was the dominant male orangutan of Camp Leakey, but he lost a fight with TOM, and was replaced
by him.

1990

1991

1992

1993

1994

1995

1996

1997

1998

2000

2007

YAYAT, when he became a cheekpadder, exercised dominance
over Kusasi, who kept his distance. But, when Kusasi grew his cheekpads, becoming an adult, he turned the tables. Although Yayat still visits the Camp, he keeps away from Kusasi.

1991