If you’re an ornithologist writing a scientific paper, you’d presumably be using a genus + species in Latin rather than any colloquial name anyway, while still acknowledging that they fall under the umbrella term “seagull” for most people. But I’m a descriptive linguist, rather than prescriptive, and that’s really what this meme is about (it’s not about seagulls)
I enjoy having semi-serious discussions about nonsense like this, so I appreciate RubberElectron’s reply calling me out