Load control speed screw conveyer

<p>The flight paths of two blue bottle flies (<i>Calliphora vomitoria</i>) sampled from high-speed video (<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0151099#pone.0151099.s002" target="_blank">S1 Movie</a>): A) at the rate of the visual system of a human (40 frames/s) and B) at the rate of a pied flycatcher (120 frames/s) at a light intensity of approximately 500 cdm^-2. The flycatcher refreshes visual input almost three times faster, resulting in a much more detailed view of the flight paths of the flies.</p

Flicker fusion frequencies for collared (closed diamonds) and pied flycatchers (open squares).

<p>Averages are shown together with ranges (brackets). Seven collared and eight pied flycatchers were repeatedly tested at up to five different light intensities each: 160 (n = 5 collared + 4 pied), 350 (n = 7 + 4), 750, 1500 (n = 7 + 8) and 3500 cdm^-2 (n = 6 + 7). The critical flicker fusion frequency (CFF), with a maximum of 141 Hz and 128.1 ± 9.8 Hz (±SD) on average for the collared flycatchers and up to 146 Hz and 138.2 ± 6.5 Hz on average for the pied flycatchers, was attained in both species at 1500 cdm^-2.</p