![]() Other variables that affect lizards are day length ( photoperiod) and rainfall. This quality makes them ideal colonizers, and hard-shelled gecko eggs seem to be particularly equipped for such journeys. Even while riding on mats of floating vegetation in rivers and oceans, many lizards can survive for long periods without fresh water. In addition, lizards form a conspicuous portion of the fauna of oceanic islands, where the species diversity of amphibians and mammals is generally low. Some lizards in extreme environments harvest water from the dew that collects on their skin in early morning, and thus deserts do not pose severe problems to them. This may account for their success at colonizing oceanic islands and surviving in extreme deserts. Because of their low metabolic rates relative to those of birds and mammals, lizards use less water. All insectivorous lizards take in a large amount of water in the prey that they consume, and herbivorous lizards have salt glands for the active excretion of mineral salts. All reptiles excrete uric acid and thus do not need great amounts of liquid to rid themselves of nitrogenous wastes. Water is less of a problem to lizards than is temperature regulation. SpaceNext50 Britannica presents SpaceNext50, From the race to the Moon to space stewardship, we explore a wide range of subjects that feed our curiosity about space!.Learn about the major environmental problems facing our planet and what can be done about them! Saving Earth Britannica Presents Earth’s To-Do List for the 21st Century.100 Women Britannica celebrates the centennial of the Nineteenth Amendment, highlighting suffragists and history-making politicians.COVID-19 Portal While this global health crisis continues to evolve, it can be useful to look to past pandemics to better understand how to respond today.Student Portal Britannica is the ultimate student resource for key school subjects like history, government, literature, and more.This Time in History In these videos, find out what happened this month (or any month!) in history.#WTFact Videos In #WTFact Britannica shares some of the most bizarre facts we can find.Demystified Videos In Demystified, Britannica has all the answers to your burning questions.Britannica Classics Check out these retro videos from Encyclopedia Britannica’s archives.Britannica Explains In these videos, Britannica explains a variety of topics and answers frequently asked questions. ![]()
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