diff --git a/src/main/java/dev/callmeecho/hollow/client/render/entity/FireflyEntityRenderer.java b/src/main/java/dev/callmeecho/hollow/client/render/entity/FireflyEntityRenderer.java
index 52bceaa..dd73d8b 100644
--- a/src/main/java/dev/callmeecho/hollow/client/render/entity/FireflyEntityRenderer.java
+++ b/src/main/java/dev/callmeecho/hollow/client/render/entity/FireflyEntityRenderer.java
@@ -53,7 +53,6 @@ public void render(FireflyEntity entity, float yaw, float tickDelta, MatrixStack
 
     @Override
     protected int getBlockLight(FireflyEntity entity, BlockPos pos) {
-        // fake emmissive light
         return 15;
     }
 
diff --git a/src/main/java/dev/callmeecho/hollow/main/Hollow.java b/src/main/java/dev/callmeecho/hollow/main/Hollow.java
index d8c6f23..d90aeb9 100644
--- a/src/main/java/dev/callmeecho/hollow/main/Hollow.java
+++ b/src/main/java/dev/callmeecho/hollow/main/Hollow.java
@@ -7,8 +7,14 @@
 import dev.callmeecho.hollow.main.registry.HollowEntityTypeRegistry;
 import dev.callmeecho.hollow.main.registry.HollowItemRegistry;
 import net.fabricmc.api.ModInitializer;
+import net.fabricmc.fabric.api.biome.v1.BiomeModifications;
+import net.fabricmc.fabric.api.biome.v1.BiomeSelectors;
 import net.fabricmc.fabric.api.object.builder.v1.entity.FabricDefaultAttributeRegistry;
+import net.minecraft.entity.SpawnGroup;
+import net.minecraft.entity.SpawnRestriction;
 import net.minecraft.util.Identifier;
+import net.minecraft.world.Heightmap;
+import net.minecraft.world.biome.BiomeKeys;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -23,8 +29,14 @@ public void onInitialize() {
         RegistrarHandler.process(HollowBlockRegistry.class, MODID);
         RegistrarHandler.process(HollowItemRegistry.class, MODID);
         RegistrarHandler.process(HollowEntityTypeRegistry.class, MODID);
+        
         FabricDefaultAttributeRegistry.register(HollowEntityTypeRegistry.FIREFLY, FireflyEntity.createFireflyAttributes());
-
+        BiomeModifications.addSpawn(BiomeSelectors.includeByKey(
+                BiomeKeys.SWAMP,
+                BiomeKeys.MANGROVE_SWAMP
+        ), SpawnGroup.AMBIENT, HollowEntityTypeRegistry.FIREFLY, 20, 10, 30);
+        SpawnRestriction.register(HollowEntityTypeRegistry.FIREFLY, SpawnRestriction.Location.NO_RESTRICTIONS, Heightmap.Type.MOTION_BLOCKING_NO_LEAVES, FireflyEntity::canSpawn);
+        
         GROUP.initialize();
     }
 }
diff --git a/src/main/java/dev/callmeecho/hollow/main/entity/FireflyEntity.java b/src/main/java/dev/callmeecho/hollow/main/entity/FireflyEntity.java
index 3390d25..f2185be 100644
--- a/src/main/java/dev/callmeecho/hollow/main/entity/FireflyEntity.java
+++ b/src/main/java/dev/callmeecho/hollow/main/entity/FireflyEntity.java
@@ -4,6 +4,7 @@
 import net.minecraft.entity.Entity;
 import net.minecraft.entity.EntityType;
 import net.minecraft.entity.Flutterer;
+import net.minecraft.entity.SpawnReason;
 import net.minecraft.entity.ai.AboveGroundTargeting;
 import net.minecraft.entity.ai.NoPenaltySolidTargeting;
 import net.minecraft.entity.ai.control.FlightMoveControl;
@@ -23,6 +24,9 @@
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.util.math.MathHelper;
 import net.minecraft.util.math.Vec3d;
+import net.minecraft.util.math.random.Random;
+import net.minecraft.world.LightType;
+import net.minecraft.world.ServerWorldAccess;
 import net.minecraft.world.World;
 
 import java.util.EnumSet;
@@ -90,7 +94,7 @@ public static DefaultAttributeContainer.Builder createFireflyAttributes() {
     public void tick() {
         super.tick();
         
-        if (this.age % 2 == 0 && this.random.nextInt(5) == 0) {
+        if (this.age % 5 == 0 && this.random.nextInt(5) == 0) {
             this.setLightTicks(this.getLightTicks() - this.random.nextBetween(10, 15));
         } else {
             this.setLightTicks(this.getLightTicks() + 1);
@@ -100,7 +104,7 @@ public void tick() {
             this.setLightTicks(15);
         }
         
-        if (this.getLightTicks() < 0) {
+        if (this.getLightTicks() < 0 || this.isWet()) {
             this.setLightTicks(0);
         }
     }
@@ -128,6 +132,12 @@ protected void pushAway(Entity entity) {
         
     }
 
+    public static boolean canSpawn(EntityType<FireflyEntity> entityType, ServerWorldAccess worldAccess, SpawnReason spawnReason, BlockPos pos, Random random) {
+        if (pos.getY() < 63) return false;
+        if (worldAccess.getLightLevel(LightType.BLOCK, pos) > 9)  return false;
+        return FireflyEntity.canMobSpawn(entityType, worldAccess, spawnReason, pos, random);
+    }
+
     static class FlyRandomlyGoal extends Goal {
         private final FireflyEntity firefly;
         
@@ -138,10 +148,10 @@ public FlyRandomlyGoal(FireflyEntity firefly) {
         
         protected Vec3d getWanderTarget() {
             Vec3d rotation = firefly.getRotationVec(0.0F);
-            Vec3d target = AboveGroundTargeting.find(firefly, 8, 7, rotation.x, rotation.z, MathHelper.HALF_PI, 3, 1);
+            Vec3d target = AboveGroundTargeting.find(firefly, 8, 2, rotation.x, rotation.z, MathHelper.HALF_PI, 3, 1);
             if (target != null) return target;
             
-            return NoPenaltySolidTargeting.find(firefly, 8, 4, 1, rotation.x, rotation.z, MathHelper.HALF_PI);
+            return NoPenaltySolidTargeting.find(firefly, 8, 2, -2, rotation.x, rotation.z, MathHelper.HALF_PI);
         }
         
         @Override
diff --git a/src/main/resources/data/minecraft/tags/entity_types/frog_food.json b/src/main/resources/data/minecraft/tags/entity_types/frog_food.json
new file mode 100644
index 0000000..3676f3e
--- /dev/null
+++ b/src/main/resources/data/minecraft/tags/entity_types/frog_food.json
@@ -0,0 +1,6 @@
+{
+  "replace": false,
+  "values": [
+    "hollow:firefly"
+  ]
+}
\ No newline at end of file