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.
Great Plague of Vienna plague outbreaks since the first wave of "Black Death" in the fourteenth century. The city was crowded and densely built. Descriptions indicate that there were no public sewers or drainage systems, with stinking mounds of domestic garbage littering the streets. In addition, warehouses for trade goods, which held items such as clothing, carpets, and grain for months at a time, were heavily infested with rats. Conditions in the city were considered so unhealthy and filthy, even for the time, that the plague often carried the title "Viennese death" in other parts of Europe. A religious order operating in Vienna, the