The bulk update request #9679 has been approved by @evazion.
create implication white_feathers -> feathers
create implication black_feathers -> feathers
create implication blue_feathers -> feathers
create implication red_feathers -> feathers
create implication pink_feathers -> feathers
create implication brown_feathers -> feathers
create implication green_feathers -> feathers
create implication yellow_feathers -> feathers
create implication purple_feathers -> feathers
For some reason, none of the colour_feathers tags imply the main feathers tag and I couldn't find a single discussion about it.
Also, I made quick wikis for the ones that lacked it (couldn't submit this BUR otherwise) but I'm unsure if they are adequate.
Updated