java.lang.NoSuchMethodError: net.minecraft.world.World.func_72910_y()Ljava/util/List;
    at com.ikerleon.birdwmod.entity.EntityBird.func_70636_d(EntityBird.java:200)
    at com.ikerleon.birdwmod.entity.EntityBirdDiurnal.func_70636_d(EntityBirdDiurnal.java:16)
    at net.minecraft.entity.EntityLivingBase.func_70071_h_(EntityLivingBase.java:2179)
    at net.minecraft.entity.EntityLiving.func_70071_h_(EntityLiving.java:295)
    at net.minecraft.world.World.func_72866_a(World.java:1993)
    at net.minecraft.world.WorldServer.func_72866_a(WorldServer.java:832)
    at net.minecraft.world.World.func_72870_g(World.java:1955)
    at net.minecraft.world.World.func_72939_s(World.java:1759)
    at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:613)
    at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:767)
    at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:397)
    at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:668)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526)
    at java.lang.Thread.run(Unknown Source)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Thread: Server thread
Stacktrace:
    at com.ikerleon.birdwmod.entity.EntityBird.func_70636_d(EntityBird.java:200)
    at com.ikerleon.birdwmod.entity.EntityBirdDiurnal.func_70636_d(EntityBirdDiurnal.java:16)
    at net.minecraft.entity.EntityLivingBase.func_70071_h_(EntityLivingBase.java:2179)
    at net.minecraft.entity.EntityLiving.func_70071_h_(EntityLiving.java:295)
    at net.minecraft.world.World.func_72866_a(World.java:1993)
    at net.minecraft.world.WorldServer.func_72866_a(WorldServer.java:832)
    at net.minecraft.world.World.func_72870_g(World.java:1955)

-- Entity being ticked --
Details:
    Entity Type: birdwmod:green_heron (com.ikerleon.birdwmod.entity.northamerica.EntityGreenHeron)
    Entity ID: 131
    Entity Name: Green Heron
    Entity's Exact location: -233.50, 65.00, 135.50
    Entity's Block location: World: (-234,65,135), Chunk: (at 6,4,7 in -15,8; contains blocks -240,0,128 to -225,255,143), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
    Entity's Momentum: 0.00, -0.08, 0.00
    Entity's Passengers: []
    Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
    at net.minecraft.world.World.func_72939_s(World.java:1759)
    at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:613)

-- Affected level --
Details:
    Level name: world
    All players: 0 total; []
    Chunk stats: ServerChunkCache: 625 Drop: 0
    Level seed: -9114722770570814849
    Level generator: ID 00 - default, ver 1. Features enabled: true
    Level generator options:
    Level spawn location: World: (-240,64,252), Chunk: (at 0,4,12 in -15,15; contains blocks -240,0,240 to -225,255,255), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
    Level time: 1 game time, 1 day time
    Level dimension: 0
    Level storage version: 0x00000 - Unknown?
    Level weather: Rain time: 148589 (now: false), thunder time: 150931 (now: false)
    Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
    at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:767)
    at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:397)
    at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:668)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526)
    at java.lang.Thread.run(Unknown Source)

-- System Details --
Details:
    Minecraft Version: 1.12.2
    Operating System: Windows 10 (amd64) version 10.0
    Java Version: 1.8.0_221, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 3567330648 bytes (3402 MB) / 4145545216 bytes (3953 MB) up to 4145545216 bytes (3953 MB)
    JVM Flags: 2 total; -Xms4G -Xmx4G
    IntCache: cache: 1, tcache: 1, allocated: 12, tallocated: 94
    FML: MCP 9.42 Powered by Forge 14.23.5.2838 25 mods loaded, 25 mods active
    States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored