기후변화로 인해 감소하고 있는 캐나다 어치의 수 Canada jay numbers in southern Ontario decreasing because of climate change, study suggests 기사소개: www.kosen21.org/info/globalNews/globalNewsDetail.do?articleSeq=NEWS_000000000000324 기사원문: https://www.cbc.ca/news/technology/canada-jay-numbers-in-southern-ontario-decreasing-because-of-climate-change-study-suggests-1.5902929