Birtds start singing very early and noisy

1.4 km

2.5 km

2.7 km

3.0 km

3.2 km

3.5 km

3.5 km

3.6 km

4.3 km

4.3 km

4.3 km

4.4 km

4.4 km

4.5 km

5.4 km

6.0 km

6.3 km

6.9 km

7.3 km

7.6 km

7.6 km

7.8 km

8.7 km

9.0 km