Collard relies on his trademark style in this latest title that demonstrates how a species evolves in response to its environment. The author compares two types of lizards found on the Galápagos Islands: one that dives underwater to eat ocean algae and another that eats prickly pears. Using the latest scientific theories to explain how a lizard ancestor could have reached the islands, Collard deftly examines why the two iguana species are so different in size, coloration, and other traits despite their common heritage. Detailed photographs illustrate the differences between the species and show other flora and fauna of the archipelago. Helpful sidebars discuss topics such as the use of DNA in dating the divergence of species, the giant tortoises of the Galápagos, and Charles Darwin's famous exploration of the area. Back matter includes suggested titles for further reading on evolution, Darwin, and the Galápagos. A comprehensible explanation of evolution and adaptation, perfect for elementary and middle school collections.
(My review of this book was first published in February 2019 by School Library Journal.)