To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie 2 Evaluation method for the trials of experiments 2 and 3. This example shows a trial when a 100% horizontally (left) and 100% vertically (right) polarized stimulus pair was applied. How does the water springtail optically locate suitable habitats? Spectral sensitivity of phototaxis and polarotaxis in Podura aquatica Ádám Egri, and György Kriska Journal of Experimental Biology 2019. 222:None-None; doi: 10.1242/jeb.199760 Download Original Video