In this guide all the Monster Trophies Items are listed up with the locations where you can get them. These here are just the best locations to farm them, there are more possible spawn locations. You need those Monster Trophies for the Atronach Element Collector, Chitin Accumulator, Dwarven Secrets Gatherer, Monstrous Component Collector, Nature Collector, Tamriel Beast Collector and Undead Hoarder Achievement. Thanks to @Zayoo for providing the list!

@Zayoo also has a Guild that focuses on Achievement completion, if you want to join please whisper him ingame or write him a mail to @Zayoo on the PC EU server.

Table of Contents:

Atronach Element Collector

Here you can find the list with all the items needed for the Atronach Element Collector. Once you have collected all the pieces, you will be awarded with the “Elemental White Dye”.

Trophies
Smoldering Ember HeartFlame Atronach
Craglorn –> Spellscar
Fleshy SymbiontFlesh Atronach
Malabal Tor –> Around Abamath
EverfrostFrost Atronach
Craglorn –> Spellscar
Crackling LodestoneStorm Atronach
Craglorn –> Spellscar

Chitin Accumulator

Here you can find the list with all the items needed for the Chitin Accumulator. Once you have collected all the pieces, you will be awarded with the “Mudcrab Maroon Dye”.

Trophies
Petrified Spider EggSpider
Glenumbra –> Spindleclutch I (Dungeon)
Calcified CuttleKwama
Shadowfen –> Onkobra Kwama Mine (Delve)
Razor-Edged MandibleShalk
Stonefalls –> Sulfur Pools
Luminous Blood SacHoarvor
Xal Ithix (Farm SW in Shadowfen)
Polished Shell ShardMudcrab
Wrothgar –> All Beach Areas
Prized BarbScorpion
Craglorn –> Scorpion Ravine
Mulifaceted EyeNix HoundStonefalls
Gossamer WingletWaspReaper’s March

Dwarven Secrets Gatherer

Here you can find the list with all the items needed for the Dwarven Secrets Gatherer. Once you have collected all the pieces, you will be awarded with the “Faded Dwemer Scholar Red Dye”.

Trophies
Perfectly Balanced GyroDwarven Sphere
Bangkorai –> Razak’s Wheel (Delve)
Whirring DynamoDwarven Spider
Bangkorai –> Razak’s Wheel (Delve)

Monstrous Component Collector

Here you can find the list with all the items needed for the Monstrous Component Collector. Once you have collected all the pieces, you will be awarded with the “Trolls Fur Brown Dye”.

Trophies
Werewolf’s CameoWerewolf
Glenumbra –> Aldcroft Swamp (South and Southwest of Wolf’s Camp)
Nose ShackleOgrim
Coldharbour –> Mine Outside Tower of Lies
Troll SkullTroll
The Rift –> Around Trollslayer’s Gully
Ogre Toe RingOgre
Stormhaven –> Bonesnap Ruins
Stony HeartGargoyle
Bangkorai –> Qharroa Ruins
Second SkinLamia, Lamia Curare
Coldharbour –> South of the Moonless Walk
Flawless Tail FeatherHarpy
Bangkorai –> Blackheart Haven (Dungeon)
Wrothgar –> Colperch Cavern (Delve)

Nature Collector

Here you can find the list with all the items needed for the Nature Collector. Once you have collected all the pieces, you will be awarded with the “Spriggan Green Dye”.

Trophies
Primal SproutlingSpriggan
Grahtwood –> Vinedeath Cave (Delve)
Lashing TentacleStrangler
Malabal Tor –> Blackvine Ruins (Delve)
Brass AnkletNereid
Greenshade –> Nereid Temple Cave (Near Dread Vullain)
Imp’s EffigyImp
Glenumbra –> Area North of Daggerfall
Icebound VertebraeIce Wraith
Eastmarch –> Hall of the Dead (Public Dungeon)
Knotted HeartLurcher
Bangkorai – Jackdaw Cove
Glowing RemnantWisp
Stonefalls –> Crow’s Wood (Public Dungeon)

Tamriel Beast Collector

Here you can find the list with all the items needed for the Tamriel Beast Collector. Once you have collected all the pieces, you will be awarded with the “Beast Collector Violet Dye”.

Trophies
Shimmering Alit BezoarAlit
Shadowfen –> Southeast Swamp Area
Magnificent Bat PeltGiant Bat
Reaper’s March –> Jode’s Light (Delve)
Gnarled Bear ClawBear / Black Bear
Auridon –> Shattered Grove
Wolf’s Tooth NecklaceWolf
Auridon –> Shattered Grove
Cat’s ClawSabre Cat, Senche TigerReaper’s March
Inert EggLamia, Lamia Curare
Reaper’s March –> Thormar
Malformed Kagouti TuskKagouti
Shadowfen NE and NW of Gandranen Ruins (Delve)
Huge Mammoth’s ToothMammoth
Eastmarch –> Area South of Thief Mundus
Malabal Tor –> Vulkwasten & Treehenge
Buzzing SpineWamasu
Grahtwood –> The Gray Mire (Southwest)
Bile GiltBull Netch
Vvardenfell –> Nchuleftingth, Bal Foyen
Cruel CollarJackal
Alik’r Desert –> Ogre’s Bluff
Alik’r Desert –> Between Lekis Blade and Lost City of the Na-Totambu
Hew’s Bane –> No Shira Citadel (NE Part)
Craglorn –> Area west of Belkarth
Scaly Durzog HideDurzog
Wrothgar –> Nikolvarra’s Kennel (Delve)
Auridon –> Tootmaul Gully (Public Dungeon)

Undead Hoarder

Here you can find the list with all the items needed for the Undead Hoarder. Once you have collected all the pieces, you will be awarded with the “Gangrene Green Dye”.

Trophies
Hand of GloryScaled Court Zombie
Craglorn –> Skyreach Catacombs
Chattering SkullSkeletal Fire Mage / Assassin
Craglorn –> Skyreach Catacombs
Wraith ShackleWraith
Rivenspire –> Crypt Of Hearts I (Dungeon)
Greenshade –> Rulanyil’s Fall (Public Dungeon)
Twitching Draugr HandDraugrs
Eastmarch –> Direfrost Keep (Dungeon)
Eastmarch –> Hall of the Dead (Public Dungeon)
Ectoplasmic DischargeSpectrals, Ghosts
Auridon –> Tanzelwil
Crypt JarMummyAlik’r Desert –> The Lost City of the Na-Totambu (Public Dungeon) & Tu’whacca’s Throne (North of Goat’s Head Oasis Wayshrine)