Tail icons now use tail_hair var for overlays.

code/modules/mob/living/carbon/human/species/species.dm

@@ -25,6 +25,7 @@
 	var/base_color                                       // Used by changelings. Should also be used for icon previes..
 	var/tail                                             // Name of tail state in species effects icon file.
 	var/tail_animation                                   // If set, the icon to obtain tail animation states from.
+	var/tail_hair
 	var/race_key = 0       	                             // Used for mob icon cache string.
 	var/icon/icon_template                               // Used for mob icon generation for non-32x32 species.
 	var/is_small

code/modules/mob/living/carbon/human/species/station/resomi.dm

@@ -12,6 +12,8 @@
 	blood_color = "#D514F7"
 	flesh_color = "#5F7BB0"
 	base_color = "#001144"
+	tail = "resomitail"
+	tail_hair = "feathers"
 
 	icobase = 'icons/mob/human_races/r_resomi.dmi'
 	deform = 'icons/mob/human_races/r_resomi.dmi'

code/modules/mob/living/carbon/human/update_icons.dm

@@ -958,15 +958,17 @@ var/global/list/damage_icon_parts = list()
 		update_icons()
 
 /mob/living/carbon/human/proc/get_tail_icon()
-	var/icon_key = "[species.race_key][r_skin][g_skin][b_skin]"
-
+	var/icon_key = "[species.race_key][r_skin][g_skin][b_skin][r_hair][g_hair][b_hair]"
 	var/icon/tail_icon = tail_icon_cache[icon_key]
 	if(!tail_icon)
-
 		//generate a new one
 		tail_icon = new/icon(icon = (species.tail_animation? species.tail_animation : 'icons/effects/species.dmi'))
 		tail_icon.Blend(rgb(r_skin, g_skin, b_skin), ICON_ADD)
-
+		// The following will not work with animated tails.
+		if(species.tail_hair)
+			var/icon/hair_icon = icon('icons/effects/species.dmi', "[species.tail]_[species.tail_hair]")
+			hair_icon.Blend(rgb(r_hair, g_hair, b_hair), ICON_ADD)
+			tail_icon.Blend(hair_icon, ICON_OVERLAY)
 		tail_icon_cache[icon_key] = tail_icon
 
 	return tail_icon