Are the animals the same type?
No, there are both flamingoes and birds.
    src        edge_attr  dst
0     1               on    0
1     2               on    0
2     6   to the left of   17
3     6   to the left of   16
4     7  to the right of   13
5     8   to the left of   19
6     8   to the left of   18
7    10   to the left of   19
8    10   to the left of   18
9    11   to the left of   12
10   12  to the right of   11
11   13   to the left of    7
12   13   to the left of   20
13   16  to the right of    6
14   17  to the right of    6
15   18  to the right of    8
16   18  to the right of   10
17   18      in front of    9
18   19  to the right of   10
19   19  to the right of    8
20   20  to the right of   13