Are these animals the same species?
Yes, all the animals are birds.
   src        edge_attr  dst
0    0   to the left of    7
1    1            above    8
2    4   to the left of   21
3    5   to the left of   20
4    7  to the right of    0
5   14               in    1
6   20  to the right of    5
7   21  to the right of    4