Tuatara

That odd little reptile from New Zealand, no wait, it's a diapsid, no it's a reptile, no it's a higher animal, reptile again, higher animal again, reptile once more, ...an amniote (??) The drama unfolds... but the tuatara itself just doesn't care. Oh yes I do!

Wii

Is this article about "Wii" or "Nintendo Wii"? If it's "Wii," should it be called just "Wii" or "the Wii"? Or maybe "Nintendo's Wii"? Does it rhyme with "We" or "Wee"? Should "Wee" link to urine? Is "Wee" slang or a euphemism for urine? Is it a British or International word for urine? Is it even worth mentioning in the article at all? (not to mention "wee" as a synonym for "small", or "diminutive") Just some of the hard-hitting issues that provoked in excess of 1500 edits in the space of two weeks – long before the console was even released, and shortly before a massive war breaks out over "non-official external links" that leads to a huge strawpoll to end the issue, and continuing debates over whether the official or unofficial names of the console (according to official Nintendo policy, the console is called the 'Wii', not 'Nintendo Wii') and its accessories (for example, the "Wii Remote" aka "Wii-mote" aka "Wiimote") are more commonly used and which ones should be mentioned in which articles.

Eastern Gray Squirrel

Native species in North America where the dominant spelling is gray. Invasive species in the United Kingdom where they call it grey. Nationalistic tempers simmer for two years in slow and remorseless edit war after a content request for comment supposedly settles the issue in favor (favour) of the Americans. Dissatisfied Brits continually tiptoe back, changing a to e, without ever actually proposing a title change for the article. The British are coming! The British are coming! To arms!

Year 2038 problem

After 2038, it turns out that some computers are also going to run into date issues in the year 292,277,026,596, well after the predicted end of the universe. Which means we've still got some time to discuss whether the article should include a sentence that says "this is not widely regarded as a pressing issue".[117] [118] [119] [120] Apparently saying that it didn't matter itself didn't matter, because the phrase was deleted when nobody was watching and nobody even seemed to notice. And then the reference to the problem was deleted as well, so if you're reading this after finding a copy of Wikipedia amidst the fallout of the war caused by the Year 292,277,026,596 problem, the Wikimedia Foundation extends its condolences.

List of fictional ducks

You read that right; edit warring over nonexistent waterfowl. Page protections, admin interventions, accusations of vandalism and sockpuppetry fly like...well, like things that fly, anyway.

Tiger

A revert war on whether the tiger can properly be described as the "most powerful living cat" (complete with accusations that people were "tiger fanboys") gradually led to arguments about how tigers would match up vs. bears and crocodiles (oh my!), complete with another revert war about the inclusion of a YouTube video showing a tiger fighting a crocodile, eventually leading to the article being semi-protected. The debates about bears and crocodiles continue on the talk page.