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.roneverhart.com/Woodford-Reserve-Master-s-Collection-Five-Malt-Stouted-Mash-Whiskey/