If you are asked to picture an animal, what comes to your mind first? A dog? A bird? Perhaps a zebra? Chances are you thought of a vertebrate, an animal with a backbone. But vertebrates, which include the animals we are most familiar with--mammals, birds, fish, reptiles, and amphibians--actually make up less than 5% of all animal species. All the rest of the animals alive today--more than 95%--are invertebrates, animals without backbones. Can you picture a spotted ladybug, spiny sea urchin, or slimy garden slug? ANIMALS WITHOUT INVERTEBRATES explores the lives of the many fascinating creatures.
I have read this book with my 4th grade child as part of his science homeschool class. While the information is nicely informative and easy to read, the pictures are amazingly outdated for a book first published in 2003. Many times we googled images to get a better look. I recommend the book for 3rd-5th graders, but I wouldn't rely solely on it for an invertebrate unit.