One-file micro app
A wingbeat, slowed down
Pick a bird, then drag the slider to slow its wings until your eye can follow them.
Real rate
On screen
One beat lasts
Ruby-throated about 50 beats/s hovering: nps.gov
Ruby-throated about 70 beats/s in direct flight: nationalzoo.si.edu
Rufous 52 to 62 beats/s: allaboutbirds.org
Giant about 15 beats/s hovering, about 23 cm: wikipedia.org
Bee 5.5 cm, 1.95 g (male): wikipedia.org
Ruby-throated 7 to 9 cm, 2 to 6 g: wikipedia.org
Rufous 7 to 9 cm, 2 to 5 g: wikipedia.org
Sword-billed 13 to 14 cm without the bill, bill 8 to 12 cm: wikipedia.org