The wishbone or furcula is flexible and stores energy released during the wing stroke
A single wing stroke
usually produces one pulse of sound (Josephson & Halverson 1971), with one wing cycle producing a pulse on both the opening and closing of the forewings (Morris & Walker 1976).
The researchers therefore proposed that the hummingbird's two wings form bilateral vortex loops during each wing stroke
, which is advantageous for maneuverability.
I'VE recently been discharged after two months from Cardiff's West Wing Stroke
Unit and I can't thank the staff enough, from the doctors, nurses and members of the physio department.
But when the females did respond, the researchers witnessed a "striking display" -- a flashing wing stroke, up and away from the body.
In the second part of their study, a year after discovering the females' wing stroke behavior, they played back five songs to which the females had wing-stroked, plus those that preceded and followed the five songs, to six females from the first experiment.
The physics-based simulator models the RoboBee and the instantaneous aerodynamic forces it faces during each wing stroke
. As a result, the model can accurately predict RoboBee's motions during flights through complex environments.
Mexico sits only a few wing strokes
away from this park, across the Rio Grande.