Endangered and extinct furry species?

As mentioned in the title, I always wonder if there use to be a popular furry species back in the day that is now consider endangered or extinct. For example, I remember Dutch Angel Dragons use to be insanely popular back in mid to late 2010s and most people wanted a fursona based on that but fast forward to now, people barely talked about it. Heck, I spoke to some furries in my local community and some of them have zero idea what D.A.D is and it's making me feel old. Even by the time I rejoined furries in late 2022 no one really spoke about it. It's like it got vanish after Covid. Maybe in my region the species is not popular enough? Idk.

So it got me thinking if there are more furry species that are now endangered or even fully extinct. Is that even possible?