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.
Plague of Athens viral hemorrhagic fever has been considered. Given the possibility that profiles of a known disease may have morphed over time or the plague was caused by a disease that no longer exists, the exact nature of the Athenian plague may never be known. In addition, crowding caused by the influx of refugees into the city led to inadequate food and water supplies and a probable proportionate increase in insects, lice, rats, and waste. These conditions would have encouraged more than one epidemic disease during the outbreak. However, advancing scientific technologies may reveal new clues. In 2005 a correlation was made