I want to thank Pima Community College for providing me such a wonderful place to work and for all the support provided me over the years. I want to thank the Professional Development Committee for giving me a semester sabbatical (Fall 2000) and the Educational Technology Committee for awarding me a grant, both of which gave me the time necessary to complete a task as large as this one. I want to thank all my students for their support, enthusiasm, and suggestions over the years. I want to thank my family and friends who provided constructive criticisms along the way. I want to thank the Arizona-Sonora Desert Museum for providing such an exceptional facility, knowledgeable staff, photogenic plants and animals, and for accommodating me and my students over the years. Finally, essentially all the information contained in this site came from years of hard work from many dedicated naturalists.