PublisherThe University of Arizona.
AbstractAnimal activity varies greatly during daylight and nighttime hours, with species ranging from strictly diurnal or nocturnal, to cathemeral or crepuscular. Which of these categories a species falls into may be determined by a variety of factors, including temperature, and biogeographic location. In this study I analyzed diel activity patterns at 13 sites distributed around the world, encompassing a total of 901 species of reptile and amphibians. I compared these activity patterns to the absolute latitudes of each site and modeled diel behavior as a function of distance from the equator. I found that latitude does correlate with the presence of nocturnal snake and lizard species. However, I did not find significant results correlating latitude to any other reptile or amphibian lineage.