Are these animals of different species?
Yes, they are seagulls and birds.
    src        edge_attr  dst
0     0  to the right of    2
1     2   to the left of    4
2     2   to the left of    8
3     2   to the left of    0
4     2  to the right of   12
5     4   to the left of   10
6     4  to the right of    2
7     5  to the right of    6
8     5   to the left of    8
9     6   to the left of    5
10    7               in   11
11    8  to the right of    2
12    8  to the right of    5
13    9               in   15
14   10  to the right of    4
15   12   to the left of    2
16   13   to the left of   14
17   14               in   13
18   14  to the right of   13