--- a/net/minecraft/world/entity/npc/MobSpawnerTrader.java
+++ b/net/minecraft/world/entity/npc/MobSpawnerTrader.java
@@ -101,7 +101,7 @@
                     return false;
                 }
 
-                EntityVillagerTrader entityvillagertrader = EntityTypes.WANDERING_TRADER.spawn(worldserver, blockposition2, EntitySpawnReason.EVENT);
+                EntityVillagerTrader entityvillagertrader = EntityTypes.WANDERING_TRADER.spawn(worldserver, blockposition2, EntitySpawnReason.EVENT, org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason.NATURAL); // CraftBukkit
 
                 if (entityvillagertrader != null) {
                     for (int j = 0; j < 2; ++j) {
@@ -109,7 +109,7 @@
                     }
 
                     this.serverLevelData.setWanderingTraderId(entityvillagertrader.getUUID());
-                    entityvillagertrader.setDespawnDelay(48000);
+                    // entityvillagertrader.setDespawnDelay(48000); // CraftBukkit - moved to EntityVillagerTrader constructor. This lets the value be modified by plugins on CreatureSpawnEvent
                     entityvillagertrader.setWanderTarget(blockposition1);
                     entityvillagertrader.restrictTo(blockposition1, 16);
                     return true;
@@ -124,7 +124,7 @@
         BlockPosition blockposition = this.findSpawnPositionNear(worldserver, entityvillagertrader.blockPosition(), i);
 
         if (blockposition != null) {
-            EntityLlamaTrader entityllamatrader = EntityTypes.TRADER_LLAMA.spawn(worldserver, blockposition, EntitySpawnReason.EVENT);
+            EntityLlamaTrader entityllamatrader = EntityTypes.TRADER_LLAMA.spawn(worldserver, blockposition, EntitySpawnReason.EVENT, org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason.NATURAL); // CraftBukkit
 
             if (entityllamatrader != null) {
                 entityllamatrader.setLeashedTo(entityvillagertrader, true);