Varanids are the only non-avian sauropsids that are known to approach the warm-blooded mammals in stamina. Furthermore. a much higher maximum metabolic rate (MMR) gives endotherms (including birds) higher stamina than crocodiles. turtles. https://www.nacrack.com/mega-pick-As-for-Me-and-My-House-Wall-Decal-in-Hebrew-Yahauh-flash-find/