What are the twigs covering?
The twigs are covering the ground.
     src        edge_attr  dst
0      0  to the right of    5
1      0   to the left of    3
2      0   to the left of   20
3      0   to the left of    7
4      0  to the right of   24
..   ...              ...  ...
169   24   to the left of    0
170   25  to the right of   10
171   25   to the left of    7
172   25  to the right of   23
173   25   to the left of   22

[174 rows x 3 columns]