Wildlife of Ecuador: A Photographic Field Guide to Birds, Mammals, Reptiles, and Amphibians by naturalist Andrés Vásquez Noboa, witih photography byablo Cervantes Daza, covers mainland Ecuador (but by "mainland" we also mean ocean mammals). Focusing only on non-piscine verts, you will need to go elsewhere for your inverts and plants and such. But you get the point. This book covers most of what you are looking for when you are out in the wild looking for animals.
This is not a comprehensive guide, but covers the most frequently seen animals, totaling to 350 distributed across over 400…