The effects of sunbathing behaviour in winter.
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Even in winter it is possible to monitor the domes from Formica species like F. rufa and F. polyctena. The nest´s structure keeps warmth inside the nests. This becomes vissible in winter. Because the ants isolate their nests the roofs of the domes are colder than sthe soil around the nest causing the effect you can see below. Once the ‘dome’ has openend for sunbathing, they become an easy target for natural enemies.
Tag: meteomier (mier is Dutch for ant)