The bulk update request #490 is active.

create implication bruised_tail (0) -> tail (30641)
create implication cleft_tail (11) -> tail (30641)
create implication curling_tail (0) -> tail (30641)
create implication glowing_tail (14) -> tail (30641)
create implication gradient_tail (0) -> tail (30641)
create implication mistletoe_on_tail (15) -> tail (30641)
create implication rat_tail (169) -> tail (30641)
create implication sparkling_tail (0) -> tail (30641)
create implication tail_over_skirt (0) -> tail (30641)
create implication tail_through_skirt (18) -> tail (30641)
create implication tail_under_skirt (49) -> tail (30641)
create implication tailed_humanoid (8) -> tail (30641)
create implication teal_tail (2) -> tail (30641)
create implication thin_tail (82) -> tail (30641)
create implication toothed_tail (0) -> tail (30641)
create implication unusual_tail_placement (0) -> tail (30641)
create implication vaginal_fluids_on_tail (0) -> tail (30641)
create alias curly_tail (0) -> curled_tail (221)

Reason: Last chunk of tag implications that I could find that are active on e621 for "tail."

EDIT 12-31-2025: Added curly_tail -> curled_tail alias. It's an existing alias on e621.

EDIT: The bulk update request #490 (forum #3932) has been approved by @mlem.