Some prep work/support work for the alien resting icons.

code/modules/mob/living/carbon/human/alien/alien_species.dm

@@ -6,6 +6,9 @@
 	unarmed_type = /datum/unarmed_attack/claws/strong
 	secondary_unarmed_type = /datum/unarmed_attack/bite/strong
 	hud_type = /datum/hud_data/alien
+
+	has_fine_manipulation = 0
+	insulated = 1
 	gluttonous = 2
 
 	eyes = "blank_eyes"

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

@@ -3,9 +3,12 @@
 */
 
 /datum/species
+
 	var/name                                             // Species name.
+
 	var/icobase = 'icons/mob/human_races/r_human.dmi'    // Normal icon set.
 	var/deform = 'icons/mob/human_races/r_def_human.dmi' // Mutated icon set.
+	var/prone_icon                                       // If set, draws this from icobase when mob is prone.
 	var/eyes = "eyes_s"                                  // Icon for eyes.
 
 	var/primitive                              // Lesser form, if any (ie. monkey for humans)

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

@@ -161,7 +161,7 @@ Please contact me on #coderbus IRC. ~Carn x
 		for(var/image/I in overlays_standing)
 			overlays += I
 
-	if(lying)
+	if(lying && !species.prone_icon) //Only rotate them if we're not drawing a specific icon for being prone.
 		var/matrix/M = matrix()
 		M.Turn(90)
 		M.Scale(size_multiplier)