_id	Individual ID	Sex	Estaimated age at fitting a GPS collar
1	1901	female	10
2	1902	male	4
3	1903	female	5
4	1904	male	1
5	1905	female	8
6	2001	female	2
7	2002	male	3
8	2003	male	10
9	2004	male	4
10	2005	female	14
11	2101	male	3
12	2102	female	1
13	2103	male	4
14	2104	female	5
15	2201	female	10
16	2202	male	1
17	2203	male	1
18	2204	female	4
19	2301	male	2
20	2302	male	13