Bioshock: The Floating City of Columbia.

When I read that in the story of 'The Birds' they plan to build a utopia in the sky it instantly reminded me of the city of Columbia from the game 'Bioshock Infinite' developed by 2K.
Columbia is founded by the "prophet" Father Comstock, a religious fanatic and the main antagonist of the game, who claims to have the ability to see the future of his flying city. Originally funded by the US Government, with its initial purpose being to showcase of all American exceptionalism, it was made capable of cross country travel, free to distribute the founders American ideals to others.

The city was launched with great excitement and was soon sent off to distant shores, but what began as an en-devour of achievement soon went wrong. When one day Columbian citizens took war into their own hands and destroyed the Chinese city of Beijing, it was demonstrated how dangerous Columbia was and was soon revealed to have been a heavily armed battle ship, finalizing the threat it posed.
When ordered to dock back in it's home country, Comstock took matters into his own hands, and instead ascended Columbia into the heavens forever, therefore taking complete control of the city, free to spread his own ideals.

The 'utopia' certainly held its flaws, but were not seen as such by the Founders. Comstock and his supporters believed in the 'old fashioned traditional' view of America, and believed that the modern world had turned away from its divine purpose, having abandoned slavery, racial supremacy, religion and militarism. He believed that Columbia should embody his own ideals, and so with a city free from governed law, institutionalized racism and elitism were quickly widespread. There was constant paranoia from the elites, of the "foreign horde" and "anarchists" due to the racial beliefs of the time, causing Columbian xenophobia and militarism.

Similarly to Columbia, Cloud Cuckoo Land in 'The Birds' was conceptualized under the dream of a city where one cunning individual could avoid the mundane formalities of living in a governed city. As the beliefs of his home land of Athens did not suit his personal taste, he decided to create his own city where the laws would be founded on his own ideals, and he could live the life he viewed as Utopian.
Another strong similarity is that both Columbia and Cloud Cuckoo Land is that they're both designed to float between the heaven and earth, becoming a purposefully alienated world of their own. This kind of detail will be an important factor in my own designs and considering how the city would stay suspended.

Although I personally love the Bioshock series, I will make sure not to derive concepts straight from this design for my project. I would prefer to go back to original sources for research purposes, although something like the strong aesthetic choices or process behind the design work of Columbia could inspire idea choices of my own.