Descriptive statistics for log2Madult (kg) of Mesozoic dinosaur, mammal, and bird taxa, and for living mammals and birds.

n = number of taxa; SW = Shapiro Wilks’ test for normal distribution.Modern mammal subgroups: Incl. recent extinctions = data includes species that went extinct in the Late Pleistocene; Excl. airborne groups = data excludes the airborne mammalian orders Chrioptera (bats) and Dermoptera (colugos); carnivores = members of the Order Carnivora; Herbivores = members of the Orders Artiodactyla, Perissodactyla, Proboscidea, and Hyracoidea.