Sometimes, when I'm planning out my D&D adventures, I forget the little things--you know, squirrels, chipmunks, mockingbirds, lizards, and such. I bought this product as a way to "tickle my memory" and to help me make my forest treks seem a little more real. The first edition of this product was perhaps just a little weak on detail, but the recent update has made this more robust. I still don't think it's as good as some of the others in the line, but for 50¢ it does a great job of helping to add verisimilitude to my settings. Please be aware that this product focuses on temperate forests, so don't be disappointed when it doesn't help you populate your jungle or tropical rain forest (hint to HFP: mundane animal lists for these environs would make great additional products, and 50¢ per biome is a bargain). Again, I wouldn't rank this one at the top of the TBT line, but I'm glad this product is in my library and I'm very impressed with HFP's aggressive updating of the line.