<p>Original caption: "Figure 4. Capture rate of insects as a function of the Deborah number.
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Flies (empty squares), ants (filled squares). The Deborah number (De) is defined as the ratio of the fluid elastic relaxation time λ (see Fig. 3b) to the typical half-period of the swimming stroke of insects in the fluid τ. For each insect category, the capture rate decreases rapidly when De&lt;1, suggesting that trapping occurs when the elastic forces created by the insect's movements have no time to relax."
Laurence Gaume and Yoel Forterre
CC BY 2.5
Gaume, L. &amp; Y. Forterre 2007. <a rel="nofollow" class="external text" href="http://www.plosone.org/article/info:doi%2F10.1371%2Fjournal.pone.0001185">A Viscoelastic Deadly Fluid in Carnivorous Pitcher Plants</a>. <i>PLoS ONE</i> <b>2</b>(11): e1185.