A term sometimes used with zebra finches and budgies is “English”. This comes from when they were originally taken from Australia and brought back to England and selectively bred. Unless they have escaped from a home or aviary, you will not find an “English”-sized individual in the wild.
In general, English zebra finches have a rounder, fuller build and may have a calmer disposition. Standard zebra finches may weigh between 10 – 14 grams, while show-quality English zebras can weight up to 25 grams and more!
English budgies for show were selectively bred for larger body size, larger facial feathers, and bold black markings. They are much fuller bodied than the standard budgies. Their exaggerated brow feathers often give them a funny, grumpy appearance.