They lay their eggs on milkweed plants—the only foodstuff their caterpillars can consume—and then die. This new generation proceeds the journey north, and the procedure repeats for 3 to 4 generations through the spring and summer months, spreading the monarch population through the northern U.S. and into Canada.seven Proton https://josuesmeuj.anchor-blog.com/17805203/the-ultimate-guide-to-camion-grua