The original seven: The seven Dragons hatched after the conjuring at Summerhall. They're the largest and most experienced of the Dragons born after the presumed extinction of the species a century prior. Heralded as a miracle by the faith of the seven, they are perhaps the forebears of a new race of Dragons not tainted by dark Valyrian magic.
Aegos: Blood red with a black underbelly and black eyes. Two mighty bull-like horns with the tip of his tail endong with a kite like flap of skin. He was the largest of the Dragons and was ridden by King Aerys, the mad and last seen during the sack of King's Landing when he took flight from the Dragonpit and was last seen heading south into the sea.
Argella: A giant blue dragon, she is the largest after Aegos. Ridden initially by Steffon Baratheon and later by Robert. She lives in the Rainwood and is said to be the most promiscuous of all the Dragons, laying "bastard clutches" in Winterfell and Dragonstone and fighting with the other females. She's also the most cavalier and friendly of the Dragons and has been known to approach farmers and burn their nightsoil to use as fertilizer in exchange for bribes of food. Affectionately called "My great big blue bitch" by Lord Robert. Her temper matches her rider, her wrath can be terrible, but she is quick to calm down and is widely beloved.
Wears bardings of black dyed steel with gilded stags.
Terrax: Flown by Daena Tully, resides in the Eyrie. Copper in color with bright green flames, falcons, and eagles are known to roost around her great nest in the mountains of the moon, and the mountain clans bring her offerings and swore fealty to Elbert Arryn as a result of her presence. She was named after the Dragon used by Jaenara Belaerys to explore Sothoryos. She was initially one of the Dragons sent to King's Landing but was an ungovernable beast who refused all riders until lady Arryn snuck into the capital and claimed her.
Syrax: Named after the legendary Dragon of queen Rhaenyra. A yellow-gold colored dragon. He was killed by Argella during the battle of the Trident, along with Rhaegar, when the "great big blue bitch" grabbed him by the throat and dove into the banks of the Trident. Slamming the dragon into the mud and the water, snapping its back, an injury his rider would share. Robert Baratheon put Rhaegar and the beast out of their misery with his mighty war hammer.
Urrax: a charcoal-colored dragon ridden by Valarr Blackfyre and killed by Aegos during the battle of Summerhall, along with Valarr Blackfyre, the King that never was.
Winter: An albino dragon with blood-red eyes and white flames. Lady Rhaella Stark rode her during the second dance. Helped battle Aegos over Summerhall.
Maelos: Named after Ser Maelys, the twin of Aegos with the reverse coloration. Black with a red underbelly and underwings. Breathes black fire, the Dragon of King Daemon Blackfyre.
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The young dragons: Second & third generation of Dragons hatched from eggs laid by the "females" of the original seven
Sunfyre: A young, golden dragon with a red underbelly. Nests near Casterly Rock.
Daeros: Ridden by Lord Monterys Aetheryon, a silver-colored Dragon at home both in the air and water. Breathes a bluish-white flame. Was, without a rider, when Monterys was killed during the Greyjoy rebellion until Princess Visenya claimed him. Lived on bear island, kills Iron born reavers, pirates, slavers, and free folk raiders. Only the Mormont women were able to get close to him, and they regarded him as a sort of loyal stray that adopted their island.
Vaegon: A turquoise Dragon ridden by Aerion Aetheryon. Lime green fire resides at Sea Dragon point, known as the "Iron's bane" for the unprecedented slaughter of Ironborn reveaers during the Grejoy rebellion.
Dawn: An orange she-Dragon, with golden flames and fierce green eyes. Flown by Princess Rhaenys Targaryen. Too young to handle a mount for more than an hour at a time.
Vhagar: Named after one of the original Dragons, Aegon and his sister-wives used to conquer Westeros. She's a purple-red Dragon, with green flames and blue eyes. Resides in the arbor, Lady Shireen Baratheon seems to have bonded with the dragon and is beloved by the Redwyne fleet and wine merchants of the arbor, who see her as a mascot for their grapes. Too young to ride.
Vermithor: A sleek, bronze dragon named after King Jaehaerys bronze fury. A sleek, almost serpent-like dragon with extended wings. Bonded to Orys Baratheon/ too young to ride
Stormwind: A silver and grey colored Dragon with a broad chest and armored scutes along his back and snout. Gendry Greystorm rides him, the largest of the younger dragons. He was nicknamed "Argella's great bastard." by the smallfolk of the rainwood.
Vermax: A hatchling named after the Dragon of Jacaerys Velaryon. She's long and winding, with two prominent whiskers on her snout.
Aerax: A gray and ash-colored Dragon, bonded with Edmure Tully but too young to ride. Nests in the God's eyes where the green men care for him and seem to treat him as though he were a fellow man of their order. Only Dragon in history to come when whistled at.
Obyroth: Named by Archmaester Aemon, long onyx black dragon with a serpentine body, antelope-like black antlers, and an armored scute that looks like a beak tip with a dark purple underbelly and green eyes. Breathes black and green fire, is riderless and lives near the Nightfort. The Freefolk call him "The ghost eater." and revere him as some sort of spiritual being made flesh. Though no one can figure out why.
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Shrike: A dark green and lime Dragon said to stalk the Dothraki sea. Allegedly the first wild dragon seen in thousands of years. Likely nothing more than the superstitions of primitives.