Are the animals birds?
Yes, all the animals are birds.
    src        edge_attr  dst
0     0  to the right of   21
1     1   to the left of    3
2     1   to the left of    7
3     2  to the right of   21
4     2  to the right of   10
5     2  to the right of   22
6     3  to the right of   18
7     3  to the right of   11
8     3  to the right of    1
9     3  to the right of   20
10    3   to the left of    9
11    3  to the right of    4
12    4   to the left of    3
13    4   to the left of   22
14    4   to the left of    8
15    5  to the right of   21
16    7  to the right of    1
17    8   to the left of    9
18    8  to the right of    4
19    9  to the right of    3
20    9  to the right of    8
21    9  to the right of   10
22    9  to the right of   22
23   10   to the left of    2
24   10   to the left of    9
25   11   to the left of   22
26   11   to the left of    3
27   12               of    3
28   12  to the right of   14
29   12  to the right of   13
30   13  to the right of   14
31   13   to the left of   12
32   14   to the left of   13
33   14   to the left of   12
34   15  to the right of   16
35   16   to the left of   15
36   17  to the right of   19
37   18   to the left of    3
38   18   to the left of   22
39   19   to the left of   17
40   20   to the left of    3
41   20   to the left of   22
42   21   to the left of    0
43   21   to the left of    5
44   21   to the left of    2
45   22  to the right of   18
46   22  to the right of    4
47   22   to the left of    2
48   22  to the right of   11
49   22   to the left of    9
50   22  to the right of   20