By special request, this week's image is a comparison of male and female heads of the mosquito Anopheles gambiae (Diptera: Culicidae). The male is on the left and the female on the right. An interesting behavior in some mosquito species is that the females respond to specific range of sound frequency produced by the wings of the males. Smaller males (with smaller wings) beat their wings more slowly to decrease the frequency of sound that they produce and thus give an audio illusion of larger size.
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