Fog harvesting efficiency. Beetles killed by freezing had their legs and antennae removed and were positioned head down at an angle of 23° in a fog chamber. An Eppendorf tube for water collection was placed under each beetle's head. After two hours in the chamber the total amount of water captured by each of the four beetle species was measured (blue). The relative dorsal surface area of each beetle was determined and normalized to the largest beetle. This conversion factor was used to obtain the relative amount of water captured per dorsal surface area (red). The columns show mean ± SE. Columns marked with matching lower-case letters above are not significantly different at p < 0.05 (Kruskal-Wallis test and Dunn's Multiple Comparisons Test).