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Absence of haltere oscillations. (A) Percentage of flies oscillating their halteres under different conditions (free walking, N = 9; tethered walking, N = 6; tethered flying, N = 6; after landing, N = 3; after take-off, N = 3). (B) Time delay between the last tarsus leaving the ball (“take off on ball”) or the first tarsus touching the ball (“landing on ball”) and the respective on- and offsets of haltere oscillations (N = 3 each, means ± 1 SD).
