A notorious case is the snail darter, invented to block construction of the Tellico Dam in Tennessee. It was the first legal test of the US Endangered Species Act and it was fraudulent [1]. This raises huge questions about how the Endangered Species Act is actually being used, if the very first test case was about a species that scientists now think doesn't really exist as a separate thing at all.
Another case is the California Gnatcatcher, which is not an endangered kind of bird, but green NIMBYs argued under the ESA that the coastal California Gnatcatcher was a different species that would be endangered by construction. They have successfully kept the "coastal" variant of the bird listed as an endangered species for decades, which regularly blocks or slows down construction in CA.
They love this game! After all, what defines a species? It's a vague concept and the taxonomists who decide whether something is a new species are academics, who are all on the far left. Nothing stops them publishing a paper that concludes the animals next to any planned project are unique and special snowflakes that must be protected, purely because they just want to block progress.
To put the scale of this problem in perspective, last year taxonomists "discovered" 260 new species of freshwater fish alone [2]. They claim that hundreds of unique kinds of fish escaped notice for centuries, that this happens every year, and each one of those kinds of fish is critical to preserve. Is this plausible?
[1] https://yibs.yale.edu/news/fish-center-key-conservation-figh...
[2] https://fishkeepingnews.com/2025/03/04/260-new-freshwater-fi...