Monarch butterflies

Monarchs and Milkweed: A Migrating Butterfly, a Poisonous Plant, and Their Remarkable Story of Coevolution by Anurag Agrawal is a fantastic, readable, scientifically rich, detailed monograph about – you guessed it – the monarch butterfly and the milkweed plant. The monarch butterfly begins a springtime northward migration by flying a good ways north, where females lay eggs and die. Then the eggs hatch, the caterpillars feed and metamorphose, and the newly minted butterflies then fly further north, and this cycle happens again. This happens a few times. The southward migration is different.…