Are there any guidebooks for finding and identifying wildlife in the Grand Canyon area? For example when (what season, month, time of day, etc.) and where (certain tree types, rocks, near the Visitor Center, etc.) to look for (rabbits, birds, etc.).
It sounds like what you are looking for is a field guide to the Grand Canyon;
Field guide - a book designed to help the reader identify wildlife (plants or animals) or other objects of natural occurrence (e.g. minerals). It is generally designed to be brought into the 'field' or local area where such objects exist to help distinguish between similar objects
Among others, A Field Guide to the Grand Canyon may be an excellent place to start.