Some animals look so alike, it's difficult to tell which is which! From alpacas and llamas to wasps and bees, readers will discover the similarities and differences between animals that are often confused for one another. Focused on 21st Century content, the Which Is Which? series encourages readers to ask questions, think more critically and creatively, and use their problem-solving skills. Books include table of contents, sidebars, glossary, index, and author biography.