Short answers, pulled from the story.
As of August 2024, the International Ornithological Congress recognises 75 heron species across 18 genera in the family Ardeidae. This total includes birds commonly called egrets and bitterns, which belong to the same family.
The goliath heron is the largest species, standing up to 152 centimetres tall. The dwarf bittern is generally considered the smallest, though several species in the genus Ixobrychus overlap closely in size.
Herons most commonly stand motionless at the water's edge or in shallows, waiting for prey to come within range. They tilt their heads from side to side to compensate for the refraction of water before striking with their bill. Some species also use bait, dropping items such as seeds, insects, or bread into the water to lure fish.
Webster's Dictionary records that herons were given the name shitepoke because of their habit of defecating when startled. The 1971 Compact Edition of the Oxford English Dictionary traces the term in North American use, applied to the small green heron, Butorides virescens, with a published example from 1853.
The word heron entered English around 1300, borrowed from Old French hairon or eron. Those forms derive from the Frankish haigiro, traced ultimately to the reconstructed Proto-Germanic root haigrô or hraigrô.
Herons fly with their necks retracted into a tight S-shape, while storks, ibises, spoonbills, and cranes fly with their necks outstretched. This is one of the key physical distinctions between herons and those superficially similar families.