Figure 2 in Effective strategy of the overwintering of semiaquatic bugs: overwintering of Velia caprai (Heteroptera: Gerromorpha: Veliidae)

Figure 2. Activity of Velia caprai (experimental group A) in the glasshouse through the winter. Activity was usually high when water temperatures were above 8°C. No activity was observed when temperatures were below 2°C. Active bugs were removed from 27 February. The activity was similar within other groups.