Editing Hibernation (section)

===Brumation in reptiles===
As reptiles are ectothermic, having no system to deal with cold temperatures would be deadly in many environments. Reptilian winter dormancy, or brumation, likely evolved to help reptiles survive colder conditions. Reptiles that are dormant in the winter tend to have higher survival rates and slower aging.<ref name="Hoekstra et al. 2019">{{cite journal |last1=Hoekstra |first1=Luke |last2=Schwartz |first2=Tonia |last3=Sparkman |first3=Amanda |last4=Miller |first4=David |last5=Bronikowski |first5=Anne |title=The untapped potential of reptile biodiversity for understanding how and why animals age |journal=Functional Ecology |date=September 9, 2019 |volume=34 |issue=1 |pages=38–54 |doi=10.1111/1365-2435.13450 |pmid=32921868 |pmc=7480806 |ref=Hoekstra et al. 2019}}</ref> Reptiles evolved to exploit their ectothermy to deliberately cool their internal body temperatures. As opposed to mammals or birds, which will prepare for their hibernation but not directly cause it through their behavior, reptiles will trigger their own hibernation through their behavior.<ref name="Malan 2014">{{cite journal |last1=Malan |first1=André |title=The Evolution of Mammalian Hibernation: Lessons from Comparative Acid-Base Physiology |journal=Integrative and Comparative Biology |date=February 28, 2014 |volume=54 |issue=3 |pages=484–496 |doi=10.1093/icb/icu002 |pmid=24585189 |url=https://academic.oup.com/icb/article/54/3/484/628216 |access-date=25 April 2023 |ref=Malan 2014|doi-access=free }}</ref> Reptiles seek out colder temperatures based on a periodic internal clock, which is likely triggered by cooler outside temperatures, as shown in the [[Texas horned lizard]] (''Phrynosoma cornutum'').<ref name="Regal 1967">{{cite journal |last1=Regal |first1=Philip |title=Voluntary hypothermia in reptiles |journal=Science |date=March 24, 1967 |volume=155 |issue=3769 |pages=1551–1553 |doi=10.1126/science.155.3769.1551 |pmid=6020475 |bibcode=1967Sci...155.1551R |s2cid=85053896 |url=https://doi.org/10.1126/science.155.3769.1551 |access-date=25 April 2023 |ref=Regal 1967}}</ref> One mechanism that reptiles use to survive hibernation, hypercapnic acidosis (the buildup of carbon dioxide in the blood), is also present in mammal hibernation. This is likely an example of [[convergent evolution]]. Hypercapnic acidosis evolved as a mechanism to slow metabolism and also interfere with oxygen transport so that oxygen is not used up and can still reach tissues in low oxygen periods of dormancy.<ref name="Malan 2014" />