Spectrogram of a Great Spotted Woodpecker drum, showing the accelerating tapping
Lots of Great Spotted Woodpecker drumming activity this morning. In this spectrogram you can clearly see how GSW drumming both speeds up and loses intensity: initial taps are 0.065 seconds apart, later ones 0.045. 14 taps in just 0.7 seconds. #UKBirding #bioacoustics