Original caption: "This high-speed video (500 frames/s, total time = 1.6 s) shows the fall and retention of a fly (<i>Calliphora vomitoria</i>) thrown into the digestive fluid on its ventral surface. The motion of the fly involves both shearing and stretching of the fluid at large Deborah numbers (10&lt;De&lt;100), thereby inducing high retentive elastic forces (the Deborah number De is defined the ratio of the elastic relaxation time of the fluid to the typical half period of the swimming stroke of insects, see text) (QuickTime, 3.7 MB)."
Gaume &amp; Forterre
CC BY 2.5
Gaume, L. &amp; Y. Forterre 2007. A viscoelastic deadly fluid in carnivorous pitcher plants. <i>PLoS ONE</i> <b>2</b>(11): e1185. <a href="https://en.wikipedia.org/wiki/Digital_object_identifier" class="extiw" title="w:Digital object identifier">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1371%2Fjournal.pone.0001185">10.1371/journal.pone.0001185</a>