Do these animals have different species?
Yes, they are goats and cows.
     src        edge_attr  dst
0      1               in    0
1      1  to the right of   27
2      1  to the right of    2
3      2   to the left of    8
4      2   to the left of   22
..   ...              ...  ...
313   43   to the left of   38
314   43  to the right of   24
315   43  to the right of   42
316   43  to the right of   40
317   43   to the left of    4

[318 rows x 3 columns]