Are the animals of different species?
No, all the animals are zebras.
    src        edge_attr  dst
0     0   to the left of    6
1     2   to the left of   18
2     2   to the left of    6
3     3   to the left of   11
4     3  to the right of   10
..  ...              ...  ...
63   20   to the left of    7
64   20               in   19
65   21   to the left of    6
66   22  to the right of   14
67   22               of   12

[68 rows x 3 columns]