Are these animals of different species?
Yes, they are sheep and goats.
    src        edge_attr  dst
0     1             near   14
1     1      in front of    4
2     1          next to   14
3     2  to the right of    6
4     3   to the left of    5
5     3   to the left of   16
6     3   to the left of   10
7     4           behind    1
8     4            above    9
9     5      standing on   15
10    5  to the right of    3
11    5  to the right of    8
12    5               on   15
13    5   to the left of    9
14    5   to the left of   14
15    5  to the right of   12
16    6  to the right of   11
17    6   to the left of    2
18    7               of    5
19    8   to the left of    5
20    9  to the right of    5
21    9  to the right of   14
22    9            below    4
23   10  to the right of    3
24   10   to the left of   14
25   10  to the right of   16
26   11   to the left of    6
27   11   to the left of   14
28   12   to the left of    5
29   13               of    5
30   13   to the left of   14
31   14  to the right of   16
32   14             near    1
33   14               on   15
34   14  to the right of    5
35   14  to the right of   13
36   14  to the right of   11
37   14  to the right of   10
38   14   to the left of    9
39   16  to the right of    3
40   16   to the left of   14
41   16   to the left of   10