Preschool-Grade 2. Schaefer combines her interest in animals and her fascination with numbers, using sparse text to introduce both animals and a numerical fact about a specific characteristic of each animal. An introduction provides the caveat that approximations differ depending on many factors in the life of the animal. The text is matter-of-fact, and the colors of the mixed-media illustrations subdued, but they complement each other in tone. It takes a bit to realize that Neal’s illustration for each animal matches the number Schaefer uses in the text. For instance, the illustration for sea horses has 1,000 “teeny-weeny, squiggly-wiggly baby sea horses.” (Feel up to counting all of them?) Thankfully, as part of the back matter, Schaefer adds detailed information about each animal and its life span, how she calculated the estimations she uses throughout the book, two animal math problems to solve, and more. Fills a clever niche for both animal science and mathematics.