>>34291712different animals are measured in different ways, retard.
snakes are by length.
birds by wingtip to wingtip
same goes for owls.
quadrupeds tend to be from ground to back. or nose to butt
for example, a horse can just lift its head to be taller, so yeah, its measured differently.
im probably wrong now when it comes to specific animals but the point is, different animals are measured differently.