The pictures are wonderful, but I am not sure I would rank it highly as an animal encyclopedia. I have a small "test" for all animal encyclopedia's marketed for children - does it have information on the domestic or black-footed ferret. One reason is because I have a child that absolutely loves all things ferret, the other is that the black footed ferret is native to North America, has been thought to be extinct twice, and is in the process of being introduced back into its natural habitat by several programs in both the US and Canada. An English language encyclopedia marketed to people in the USA should have information about a native species with a rich history. I get that it may not take up 20 pages, but that fact that animals children can read about in any encyclopedia (or really any other book on animals) takes up a prominent position - but a native species that may or may not exist 5, 10, or 50 years from not is a little daunting. I mean really, the "slug moth caterpillar" gets two pages just to itself while the black footed ferret has a picture on page 265, but doesn't have one word spoken about it in the entire encyclopedia - really! If books published in the United States don't cover native species of animals, how is any child going to learn about them? I know this might seem a silly rant, but isn't an encyclopedia supposed to open you up to new information? Almost every "animal book" ever produced is going to have pages and pages on things like the African Elephant or Zebras, or Hippopotamuses - kids have seen, heard about, and read about those animals quite a bit. I didn't see anything in this encyclopedia that would push a child's knowledge or truly open their eyes to something fascinating and new. Don't get me wrong, the pictures are stunning and it covers a lot of animals. However, when comparing it to other books that have earlier publication dates (i.e. The World Encyclopedia of Animals published in 1984) - this modern books has twice as many pictures, but half or less the actual information (both depth and breath). Again, the book isn't bad - my kids enjoy looking at the pictures. However, when they want to really learn about an animal, this isn't our "go to" source.