The Company of Biologists

Table 1.

Studied individuals

Individual	Sex	Age group	Age	Lower leg length^{^a} (cm)	Origin	Name	No. of climbing sequences
Captive^{^b}
A	Male	Subadult	16 years	25	Jersey	Mokko	8
B	Female	Adult	∼35 years	25	Wild born	Gina	6
C	Female	Adult	24 years	25	Bristol	Julitta	3
D	Male	Juvenile	4 years 2 months	16	Jersey	Kluet	13
E	Male	Juvenile	3 years 7 months	16	Jersey	Wirawan	1
Wild/rehabilitant^{^c}
F	Male	Subadult		25	Rehabilitant		4
G	Female	Adult		25	Rehabilitant	Mina	2
H	Female	Adult		25	Rehabilitant		7
I	Female	Adult		25	Rehabilitant		2
J^{^d}	Females	Adult		25	Rehabilitant		7
K	Female	Adult		25	Rehabilitant		6
L^{^d}	Females	Adult		25	Rehabilitant		3
M	Male	Adolescent		23	Rehabilitant	Darwin	6
N	Indet	Juvenile		16	Rehabilitant		2
O	Male	Adult		27	Wild (Bukit Lawang)		3
P	Male	Subadult		25	Wild (Bukit Lawang)		2
Q	Female	Adult	24 years	25	Wild (Ketambe)	Ans	5

Individual	Sex	Age group	Age	Lower leg length^{^a} (cm)	Origin	Name	No. of climbing sequences
Captive^{^b}
A	Male	Subadult	16 years	25	Jersey	Mokko	8
B	Female	Adult	∼35 years	25	Wild born	Gina	6
C	Female	Adult	24 years	25	Bristol	Julitta	3
D	Male	Juvenile	4 years 2 months	16	Jersey	Kluet	13
E	Male	Juvenile	3 years 7 months	16	Jersey	Wirawan	1
Wild/rehabilitant^{^c}
F	Male	Subadult		25	Rehabilitant		4
G	Female	Adult		25	Rehabilitant	Mina	2
H	Female	Adult		25	Rehabilitant		7
I	Female	Adult		25	Rehabilitant		2
J^{^d}	Females	Adult		25	Rehabilitant		7
K	Female	Adult		25	Rehabilitant		6
L^{^d}	Females	Adult		25	Rehabilitant		3
M	Male	Adolescent		23	Rehabilitant	Darwin	6
N	Indet	Juvenile		16	Rehabilitant		2
O	Male	Adult		27	Wild (Bukit Lawang)		3
P	Male	Subadult		25	Wild (Bukit Lawang)		2
Q	Female	Adult	24 years	25	Wild (Ketambe)	Ans	5

Lower leg lengths (distance from knee to heel) were estimated as described in the text.

Individuals A-E were observed at Jersey Zoo in September 1999.

Individuals F-Q were observed at either Bukit Lawang rehabilitation centre or Ketambe Research Station in June-October 1999.

The results were pooled from several animals that could not be recognised individually.