The monarch butterfly, one of the most seemingly delicate of all of nature`s animals, proves to be one of the toughest in this reader. With bold, colourful photographic illustrations & covering a wide range of popular non-fiction subjects, ` National Geographic Readers` stand out in the market for their widespread appeal with both boys & girls. Making the yearly trip from the Northern United States & Canada to the Oyamel forest of Mexico is no easy task, & it takes five generations of butterflies in order to do so. Battling cold temperatures & the threat of starvation, these beautiful insects complete an almost 3, 000 mile journey over the course of two months, only to have to turn & around & head back home. National Geographic supports K-12 educators with ELA Common Core Resources. Visit www.natgeoed.org/commoncore for more information.