Not true, I was for this in the Discord discussion.
Other than that, in general I think something obvious like Pidgey from Pokémon should also be tagged avian and bird - if actually shown in their original form that is, meaning not ponified or otherwise transformed, of course. Thus bird and avian shouldn’t be implied by, but tagging should be consistent of whatever it is. Pokémon are mistly based on animals after all. Ratata is a “furry, rodent, rat”, Pikachu is a “furry, rodent, pika”, Ekans is a “scalie, snake”, Horsea a “scalie, seahorse” etc.
Less prominent would be Pokémon such as Bulbasaur, well, “plant” and then I don’t know what else, so I would just leave it as “plant”.
But then you have Pokémon such as Voltorb, Ditto, and Chansey which are… something where none of those tags would apply, imo. So they just don’t get any such tags.
And to be honest, would you really not tag a Pidgey as avian and bird?
Just look at this “realistification”, the original Pokémon art style is not far from what could as well be a real thing.
Another argument to tag bird Pokémon with “bird, avian” is that it wouldn’t be uncommon for people to search for “pokemon, bird” or “pokemon, avian”. Of course that will apply to other species and supertags too. Yes, Charizard should be tagged as “dragon” and Alolan Exeggutor should not.
Well this Pokémon type mess would warrant creating a “not a dragon” tag for the memes about how Charizard isn’t a dragon type but Alolan Exeggutor is, but that’s not part of this discussion.
It also applies to other fandoms. MLPs should be tagged “pony, horse, equine” and “earth pony”, “unicorn”, “pegasus” respectively. Sonic the hedgehog should be tagged “biped, anthro, hedgehog, furry”, while Miles “Tails” Prower would be “biped, anthro, fox, furry”.