Are these animals of different species?
Yes, they are zebras and birds.
    src        edge_attr  dst
0     1   to the left of   11
1     1  to the right of    7
2     1   to the left of   14
3     2  to the right of   10
4     3   to the left of   12
5     3   to the left of    7
6     3   to the left of    9
7     3   to the left of    6
8     6   to the left of   10
9     6   to the left of    9
10    6  to the right of    3
11    6   to the left of    7
12    6   to the left of   12
13    7   to the left of   14
14    7   to the left of    1
15    7  to the right of    3
16    7  to the right of    6
17    7  to the right of    9
18    7   to the left of   11
19    9  to the right of    6
20    9  to the right of    3
21    9   to the left of   10
22    9   to the left of    7
23   10               on   12
24   10  to the right of    9
25   10  to the right of    6
26   10   to the left of    2
27   11  to the right of    1
28   11  to the right of    7
29   12  to the right of    3
30   12  to the right of    6
31   12               in    3
32   12               in    0
33   14  to the right of    1
34   14  to the right of    7