Hotter,drier conditions over the past four decades havebeen decreasing the rainforest birds'bodyi while lengthening their wingsstudy publised in the joumal Science Adnces saiday.This may be an adaptation to hotter temperatures.Even in the middle of the primitive Amazonrainforest,we are seeing the global effects of climate change caused by people,said Vitek irine,lead author on the study.