From: Life-history and hormonal control of aggression in black redstarts: Blocking testosterone does not decrease territorial aggression, but changes the emphasis of vocal behaviours during simulated territorial intrusions
Placebo
Flut/Let
Non-vocal response
Time within 5 m
↓
Feather fluffing
Vocal response
Number of songs
↑
Song duration
Pause A - B
Freq bandwidth B (duration part B)
Elements in A