The IUCN Red List of Threatened Species 2022.2
Taxonomy database of the U.S. National Center for Biotechnology Information
Global Biodiversity Information Facility
Open Tree of Life reference taxonomy version 3.7.2
A phylogeny and revised classification of Squamata, including 4161 species of lizards and snakes
Out of the dark: 350 million years of conservatism and evolution in diel activity patterns in vertebrates