Butterfly Bonanza?

Scientists have claimed that 2019 is probably a bumper year for butterflies in the UK (https://www.theguardian.com/environment/2019/aug/05/warm-weather-makes-it-a-boom-year-for-butterflies-say-experts) and have suggested that warm weather accounts for the beneficial effect. Although people enthuse about butterflies, one could argue that their atypical frequency is actually a confirmation of there being problems with the climate.