diff --git a/df_ambience/soundsets.lua b/df_ambience/soundsets.lua
index 6dd3895..a56e3a7 100644
--- a/df_ambience/soundsets.lua
+++ b/df_ambience/soundsets.lua
@@ -154,7 +154,7 @@ df_ambience.add_set({
 	sounds = {
 		{name = "dfcaverns_drums", gain = 0.3},
 		{name = "dfcaverns_frog", gain = 0.5},
-		jungle_bird, jungle_bird,
+		jungle_bird, jungle_bird, -- double up the birds to make them more common
 	},
 	sound_check = function(def)
 		return def.biome == "primordial jungle"
diff --git a/df_trees/blood_thorn.lua b/df_trees/blood_thorn.lua
index fb6eb02..fba93f2 100644
--- a/df_trees/blood_thorn.lua
+++ b/df_trees/blood_thorn.lua
@@ -37,7 +37,7 @@ minetest.register_node("df_trees:blood_thorn", {
 		"dfcaverns_blood_thorn_side.png", "dfcaverns_blood_thorn_side.png", "dfcaverns_blood_thorn_side.png", "dfcaverns_blood_thorn_side.png"},
 	paramtype2 = "facedir",
 	paramtype = "light",
-	groups = {choppy = 3, tree = 1, flammable = 2, light_sensitive_fungus = 11, handy=1,axey=1, building_block=1, material_wood=1, fire_encouragement=5, fire_flammability=5},
+	groups = {choppy = 3, tree = 1, flammable = 2, light_sensitive_fungus = 11, handy=1,axey=1, building_block=1, material_wood=1, fire_encouragement=5, fire_flammability=5, opaque=1},
 	_dfcaverns_dead_node = "df_trees:blood_thorn_dead",
 	sounds = df_dependencies.sound_wood(),
 	is_ground_content = false,