The bulk update request #8165 has been rejected.
change category extinct (4) -> species
create alias prehistoric_animal (2) -> extinct (4)
create alias prehistoric_mammal (0) -> extinct (4)
create alias prehistoric_creatures (1) -> extinct (4)
create alias paleoart (2) -> extinct (4)
create implication dinosaur (49981) -> extinct (4)
create implication mammoth (381) -> extinct (4)
create implication mastodon (13) -> extinct (4)
create implication plesiosaur (263) -> extinct (4)
create implication mosasaur (74) -> extinct (4)
create implication ammonite (11) -> extinct (4)
create implication thylacine (1330) -> extinct (4)
create implication quagga (47) -> extinct (4)
create implication dodo (418) -> extinct (4)
create implication moa_(bird) (14) -> extinct (4)
create implication passenger_pigeon (14) -> extinct (4)
create implication aurochs (95) -> extinct (4)
create implication great_auk (5) -> extinct (4)
create implication bubal_hartebeest (1) -> extinct (4)
create implication haast's_eagle (4) -> extinct (4)
create implication pyrenean_ibex (1) -> extinct (4)
create implication cave_bear (3) -> extinct (4)
create implication entelodont (17) -> extinct (4)
create implication tanystropheid (2) -> extinct (4)
create implication tully_monster (6) -> extinct (4)
Reason: I think it would be really neat to be able to search for all species that no longer exist. We already have a similar situation with the marine tag, an umbrella category for many species that are not taxonomically related but share a common trait (aquatic lifestyle in marine's case).
Source is Wikipedia as always, as well as https://www.extinctanimals.org
My BUR is, of course, incomplete. I will keep searching for these in the future.
I am not including fossil_pokemon, ancient_pokemon, or other fictional species in the BUR for now. Not sure how fictional species should be handled here.
EDIT: The bulk update request #8165 (forum #405533) has been rejected by @Wandering_Spaniel.
Updated