Are the animals of different species?
Yes, they are elephants and penguins.
    src        edge_attr  dst
0     0               on    2
1     1  to the right of    6
2     2  to the right of   10
3     2  to the right of    5
4     3  to the right of   14
5     5   to the left of    7
6     5  to the right of   10
7     5   to the left of    9
8     5   to the left of    2
9     5   to the left of   12
10    6   to the left of    1
11    6            above   14
12    7               on    0
13    7  to the right of    5
14    7  to the right of    9
15    9  to the right of   13
16    9  to the right of   10
17    9  to the right of    5
18    9   to the left of    7
19    9   to the left of   12
20    9  to the right of   11
21   10   to the left of    5
22   10   to the left of   11
23   10   to the left of    9
24   10   to the left of    2
25   10   to the left of   13
26   11  to the right of   10
27   11   to the left of    9
28   12  to the right of    5
29   12  to the right of    9
30   12               on    1
31   12      standing on    1
32   12       walking on    1
33   13  to the right of   10
34   13   to the left of    9
35   14       resting on    6
36   14               on    6
37   14       leaning on    6
38   14   to the left of    3
39   14       sitting on    6