Coccinellidae November depending on location and weather conditions. Homes or other buildings near fields or woods are particularly prone to infestation. After an abnormally long period of hot, dry weather in the summer of 1976 in the UK, a marked increase in the aphid population was followed by a "plague" of ladybirds, with many reports of people being bitten as the supply of aphids dwindled. The presence of coccinellids in grape harvests can cause ladybird taint in wines produced from the grapes. "Harmonia axyridis" (the harlequin ladybird) is an example of how an animal might be partly welcome and partly harmful.
Sexual selection in insects choice. Female calling syndrome occurs when female social insects emit a typical call to the males in close proximity to their natal nests. Males that are attracted by the callings fly extensively in pursuit of potential mates. Their gasters raise and stings start to protrude. The venom glands are a basis of a chemical male attractant. In "Xenomyrmex floridanus", the queen’s venom glands and gasters both attracted males and prompted copulation. Sexual selection in insects Sexual selection in insects is about how sexual selection functions in insects. Among social insects, males have evolved exaggerated adornments and mechanisms for self-defense. These