You don't have to classify Dragons the way I do but this is they way I will be writing about them.

Group 1

HOW TO TRAIN YOUR DRAGON DRAGONS

Everyone who likes Dragons know about these guys so therefore I find them the most popular.

Strike class

Night fury 

Light Fury

Night light

Deathgripper

Skrill

Triple Stryke 

Snow Wraith

Stoker class

Monstrous Nightmare

HobGobbler

Red Death

Hobblegrunt

Terrible Terror

Fireworm

Typhoomerang 

Shadow Wing

Night Terror

Singetail

Threadtail

Mystery class

Hideous Zippleback

Flightmare

Changewing 

Death Song

Smothering Smokebreath

Armorwing

Cavern crasher 

Slitherwing

Snappertrapper 

Buffalord

Dramillion

Sandbuster 

Tracker class

Deadly Nadder 

Rumblehorn 

Windgnasher

Boulder class

Gronckle

Crimson Goregutter

Hotburple

Whispering Death

Screaming Death

Catastrophic quaken

Sentinel

Eruptidon

Snaffelfang

Shovelhelm

Tidal Class

Bewilderbeast 

Thunderdrum 

Scauldron

Seashocker

Submaripper 

Shellfire

Sharp Class

Stormcutter 

Razorwhip 

Timberjack 

Speed Stinger

Scuttleclaw

Grim Gnasher

Raincutter

Group 2 (island Dragons)

WINGS OF FIRE DRAGONS

Pyrrhia 

Sandwing 

Skywing 

Icewing 

Nightwing

Rainwing 

Seawing 

Mudwing 

Pantala 

Hivewing 

Leafwing 

Silkwing 

The Island of Pern Dragons

Fire lizards  (a miniature species of Dragon) and Dragons

Goldens

Browns

Greens

Blues

Bronzes

Group 3 

DRAGONS FROM HARRY POTTER

Norwegian Ridgeback 

Hungarian Horntail

Common Welsh Green

Ukranion ironbelly 

Chinese Fireball

Swedish Short Snout

Antiopodean Opaleye 

Hebridean Black

Peruvian Vipertooth

Romanian Longhorn

Group 4

If you possibly know where these next Dragons come from I want you to private message me.

Cave Dragons 

Brain Pickers

Driller Dragons

Eight Legged Nadder

Eletrcstickys

Flamehuffers

Glowworms 

Gronckles

Red-Hot Itchyworms

Riproarers

Skullions

Slugbulbs 

Stickyworms 

Strangulators 

Tree Dragons

Breathquenchers

BullingDozers

Cuckoo  Dragons 

Dreamserpents 

Firestarters

Giant Bee-Eaters

Poison Darters

Red Tigers

Scarers 

ShortWing Squirrelserpents

Vampire Dragons

Vampire Spy Dragons

Wolf Fangs

Bog Dragons 

Arsenic Adderwings

Big Spotted Gormless

Common or Garden Dragons

Eight Legged Battlegores

FlashFanges

Flying Gators

Hypnomunks

Long-Eared Caretaker Dragons

Marsh Tigers

Monstrous Nightmares

Poisonous Piffleworms

RhinoBacks

Sidewinders

Squealers

Stink Dragons

Toxic Nightshades

Venomous Vorpents

NanoDragons

Centidiles

Drowsy tipped Dragon mice

Eletricsquwirms

Emperor Beetlebog Bolderbugs

FlutterFires (inc. long eared)

Plankteenies

Prickleboggles

Tiddly nip tick botherers 

Mountain Dragons

Bullguard Slavedragons 

Exterminators (more commonly know as terminators)

Gloomers 

Grimlers

Hogflys

Mood Dragons

Puggles

Raptortounges 

Razorwings 

Sniffer Dragons

Snub-nosed Hellsteethers

Specklehounds

Stealth Dragons

Tounge-Twisters

Sky Dragons

Bull Roughers

Chickenpoxers

Deadly Shadows

Devilish Dervishes

Ravenhunters 

Rocket Rippers

Silver Phantoms

Triple-header Rageblasts

Two-Headed Gormatrons

Wind walkers

Zebramounts 

Sea Dragons

Brainless leg-removers

Darkbreathers

Doomfangs

Draeders 

Golphins 

Horrors

Leviathorgans

Polarserpents

Saber-toothed Driver Dragons

Savages

Seadragounous Gicanticus Maximuses

Shark worms

The Monster Of The amber slavelands

Thors Thunderers 

Winterfleshers

Woden's Nightmares

Type 5

UNCLASSIFIED SPECIES

Luminous Krayfin 

Shivertooth

Ghastly Zapplejack

Sand wraith (my Favorite)

Deathly Galeslash

Tide glider

Woolly howl

Chimeragon

 Sweet death

Shock jaw 

Mud racker 

Grapple grounder

Groncile

Thunderpede 

Prickleboggle 

Keep in mind that this page will never be finished. Each time I have a new Dragon I will put it in here.