Are these animals of different species?
Yes, they are horses and birds.
    src        edge_attr  dst
0     0   to the left of    2
1     0  to the right of    1
2     1  to the right of    6
3     1   to the left of    0
4     2  to the right of    0
..  ...              ...  ...
70   24   to the left of   10
71   24  to the right of   16
72   24   to the left of   15
73   25   to the left of   24
74   25   to the left of   16

[75 rows x 3 columns]