House sparrows are more closely associated with humans than any other established North American wild bird. There are about three dozen species of sparrows in North America. The species was introduced to New York City in 1851 when NYC faced a serious problem. The snow-white linden moth was devouring fruit trees and leafy elms. City officials hoped the sparrows would devour the moth larvae and they did.
But, there's is a similarity between the fictional Audrey and sparrows — a non-stop appetite. After eating moth larvae, sparrows devoured vital crops, stole the nests of native birds, and flourished in urban habitats by killing off weaker species — in short, they were predators, especially targeting bluebirds. By the 1980's, America’s indigenous bluebird population was in steep decline. It has since been coming back.
Sparrows flourish in large cities and country settings, and can often displace other birds from nest boxes, (I'm unsure if that happened here.) This sparrow family occupied half of a two-nesting birdhouse, which must have been tight quarters.
This duo kept the mother and father sparrow quite busy every 5-10 minutes. Although they are primarily seed-eaters, sparrows also eat small insects and considerable supplies are required to feed the young ones.
Another similarity to Audrey . . . Come on back and feed
How about you — birdhouses or not?