What weather is causing.

Predicting effects of climate change on  population sizes will be hard in some cases  to the lack of knowledge of the species biology. Early snow melt in the first year leads to lower availability of the butterfly's  flower species a result of newly developing plants being exposed to early season frosts that kill flower buds. Studies showed that shortens  flowers and there for nectar per butterfly adversely affected butterfly population growth rate. Then the other bugs will be bothering me because of the butterfly's growth problem. The butterfly's growth problem will effect the other species that feed off of them then that species that's feed of the butterfly will effect that specie and so one. then soon there will be a whole species wiped out then another and soon the humans will be on the line.