Storks are large to very large, long-legged, long-necked water birds with long, stout bills.
They range in size from 152 cm (60 in) tall and can weigh 8.9 kg (20 lb), to 75 cm (30 in) high and only weighs 1.3 kg (2.9 lb). Their shape is superficially similar to the herons, with long legs and necks, but they are heavier-set.
In size, males are up to 15% bigger than females and almost no difference in appearance. The only difference is in the colour of the iris of the two.
