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. 2017 Oct 11;7:12956. doi: 10.1038/s41598-017-13509-7

Figure 1.

Figure 1

The role of weather (light levels and ambient air temperature) on Vespa velutina male attraction to living, mature virgin queens (gynes). The inset photo shows a male landing on a cage with a living gyne. The number of males at a MCA was strongly influenced by weather, primarily by average air temperature during mating attraction and sunlight (sunny = 99.0 ± 4.2 klx, cloudy = 28.8 ± 6.26 klx). The curve fit is a moving average between two successive points. Sample sizes are given in Table S1.