Monarch butterflies face hardships on fall migration
https://www.upi.com/Science_News/2019/03/19/Monarch-butterflies-face-hardships-on-fall-migration/8021553004839/?ls=3&fbclid=IwAR3vL4y6cg7uj-fZ19Rc_fA9UampY-6PDddOpHgZFWhAwV8xouTFqaGd9P8 Source Cited: www.upi.com Sign in to see full entry.