Hasnain Nangyal is a research fellow in the Department of Botany, Faculty of Sciences at Hazara University, Mansehra, Khyber Pakhtoonkhwa, Pakistan. He has published review articles, research papers, and books and is an active member of many national and international research organizations. He is also an editorial board member and reviewer for several professional journals and magazines. He is a member of the publishing team for the book series Biodiversity Distribution & Conservation and has published three chapters in the book Biodiversity Distribution & Conservation.Muhammad Saleem Khan, PhD, is a research fellow in the Department of Zoology at Government College University, Faisalabad, Pakistan, and is currently Assistant Professor of Zoology (Guest) in the Department of Biological Sciences at the University of Okara, Pakistan. He has published more than 40 research and review articles and is also working as a reviewer in many journals.