From: Video analysis of the escape flight of Pileated Woodpecker Dryocopus pileatus: does the Ivory-billed Woodpecker Campephilus principalis persist in continental North America?
mean wingbeat rate (beats s -1 )
Wingbeats
Overall
1–4
5–8
mean
PIWO flight 1
7.1
-
3.9
PIWO flight 2
6.7
4.4
5.0
PIWO flight 3
8.6
4.0
PIWO flight 4
8.0
5.7
6.0
Luneau video