A Lesson From the Cuckoo Bird

Is there an object lesson is to be had, or story moral to be learned- from the frightful tale of the Cuckoo bird? A bird that neither plans nor toils its own nest to build, but seeks the industry of its neighbor to exploit- and in its nest an alien egg to lay. An egg that is left by the Cuckoo bird- to be brooded and hatched by foster parents- and the illegal hatchling to be reared- at the expense of the rightful own. An illegal chick that displaces the rightful- demanding food unceasingly day and night- until the exploited foster parents usually die- their vital resources totally exhausted. It then leaves the foster nest and flies away- this cycle of piracy again to repeat.