Changelings are herbivorous/emovoric Equine mammals that are closely related to ponies and are capable of magic, flight, and shape-shifting. they feed on various plants and positive emotions, though like all equines, they can eat meat. their myriad insect-like features tend to lead to many misconceptions, such as that they are insects, have a hive mind, or that the queen is the mother of every changeling in the Swarm. these beliefs are all wrong. A changeling can change into any animal or being roughly their size for a maximum limit of three days.

Changelings are found everywhere except the far north and the Crystalline Raj (not to be confused with the Crystal Empire)

they come in several distinct body shapes, divided into two Mega groupings: Royal and Common. Royals have long lifespans, whereas a commoner has an lifespan similar to that of an earth pony.

Normal
under most circumstances, changelings of both body types will have eyes of green, blue, or purple.

Goldmanes
a royal-specific type, these changelings have fluffy golden manes, gold eyes and wings, and can absorb 10 times more love than normal.
Goldmanes tend to work as advisors or scholars.

Grounders
a Common-specific type, Grounders have purple eyes and no wings. they tend to be maintenance workers

Vanishers
red-eyed changelings capable of becoming invisible. Common vanishers often make up the royal bodyguard or are assassins. Royal vanishers tend to be military leaders

Bruiser
a specific type of common changeling that specializes in demolition. What that translates into is a changeling who had the same build as Big Macintosh, but is about a foot taller, with orange eyes and a particularly sharp-looking set of fangs. they also tend to be surprisingly intelligent.

Longfangs
Common changelings with yellowish-green eyes and foot-long fangs who dig tunnels. they tend to be less intelligent than normal, and tend to speak inarticulately (Me good digger)

Albinos
pretty much that. just white changelings with red or pink eyes.

Blackshells
the rarest mutation, blackshells combine traits of all other mutations, save for albinos, though their eye color indicates the ability they are best at.

SOCIETY

Changelings do not live in hives. a changeling castle is usually a stone construction on the levels of Canterlot in complexity, with myriad tunnels underneath. a changeling castle is actually more like a small city, full of businesses, separate houses, libraries, and of course sports arenas and the castle itself. a group of changelings is called a Swarm.

though the majority of a changeling is furry, the shell on their back is a hard keratin whose color determines Swarm affiliation, but turn brown if the changeling does not have a Swarm, or change color when a changeling switches Swarms.

the hierarchy is similar to that of ponies, with a few exceptions. there is the working class, who run businesses, grow food, and manage profit. above them are the soldiers, the royal guards, bodyguards, and assassins. then there is the "upper crust," the advisors and the council of seven. at the top is the royal family.

the Swarms themselves have an organization. each country has several Great Swarms, among which is the High Swarm, which rules the others. there are other lesser Swarms scattered about. Chrysalis is the current High Queen of the Swarms of Equestria.

Soldier Ranking in order from least to greatest
cadet, soldier, commander, Captain first-class, Captain second-class, General, High-General

The Council of Seven
Essentially changeling Parliament. the ruler turns to them when the advisor cannot help, and they are in charge of ceremonies and executions.

Country Relations and Monetary Units
Changelings are actually relatively peaceful (the attack on Canterlot being the result of Chrysalis succumbing to Emotion Sickness, which can cause temporary insanity and is caused by changelings feeding on too much of one emotion), and tend to seek trading agreements rather than battle. they currently hold peace with Equestria (following the events of the alicorn Nyx's short-lived reign), Camelu, Tarandoland, the Crystal Empire, and most other countries.

the Quid is a small obsidian coin worth several hundred bits.

***
QUEEN CHRYSALIS- HIGH SWARM (emerald)

My dear mother and Queen of the High Swarm, Chrysalis mainly spends her time... honestly not doing much. sure, there are a few proclamations to be signed here and there, but mostly life is simple. Before the peace, her Swarm used the old "infiltrate" method. sneak in, get some love, sneak out.

QUEEN OVI- MANTIS SWARM (pink)
Fun-loving, Queen Ovi has her home in Las Pegasus, close to the Antlion Swarm. Jovial and very promiscuous, her Swarm obtains love by means of running the local bathhouse/brothel.

KING REFRACTION- ROACH SWARM (blue)
My grandpa, known for his quick decisions, pinstripe suit, and fedora, runs the Organization, a group which has deals with the Equestrian Mafia in Manehattan, trading weapons... er, I mean he runs a pet store. his Swarm runs the Alicorn Hotel, one of the best hotels in Manehattan.

QUEEN MYRRH- ANTLION SWARM (orange)

Myrrh is a normally kind queen, with her underground castle situated in the Neighave desert. thousands of years of her ancestors living in these conditions has led to Myrrh and her Swarm to their pointed hoof structure (helps with burrowing in the sand) and common changelings having more pincer like teeth. They would often pose as tour guides within the nearby cities and towns, and lead caravans astray towards the hive. They would also use their magic to create hallucinations of oasis' to lure in singular, lost, and weary travelers.

QUEEN MIASMA- MIASMA SWARM (purple)

a small nomadic swarm that is fond of the sewers of large cities. Miasma herself is a very vain and snobby queen who tries to appear better than she is. She has two changelings follow her around with incense burners wherever she goes and douses herself in perfume as often as possible. One wonders what is worse, the rotten smell of the Swarm, or the overwhelming stench of sweet perfume contrasting with it.
Although trying to appear noble and sophisticated, the queen has a very bad temper and can turn from sweet to sour in mere seconds.
She also has very bad table manners (and taste), and won't even stop short of literally rolling around in her food. It's not helped by the fact that she has holes in her cheeks so you can see her chewing even if she has her mouth closed. The Swarm's old method of gathering victims wasn't very sophisticated, ranging from cries of help from out of a gully to simply waiting for somepony to get stuck in their secretions while drunkenly wandering about at night.

QUEEN CALLIPHORA- NEKROPOLIS SWARM (rose)

The Nekropolis Swarm and its queen Calliphora is probably one of the most elusive and least explored Swarm in all of Equestria. They make their home in graveyards, feeding off ponies’ love by posing as ghosts of dead relatives and loved ones. Usually they move into already existing family graves and crypts and only set up rudimentary constructions and decorations. They have little to no contact with other Swarms and are actually often purposely avoided by them, for the simple fact that, even if it sounds unbelievable, even other changelings are creeped out by them. Beside their macabre living conditions, the biggest reason for this are their appearance and their general behavior. While they appear even more “perforated" than other changelings, with colors reminding of dead leaves and decaying matter, their most distinguishing and disturbing feature is what appears to be a second set of eyelids that they can close vertically and, while see-through, allows them to block out most light. This is important because the Swarm is almost exclusively nocturnal and thus reacts pretty badly to bright lights. Their general behavior has so far been described as “sort of otherworldly". They tend to buzz around with their second set of eyelids closed, seemingly without direction, or huddled in dark corners, humming quietly, as if listening to some inner voice. Perhaps this stems from the fungi they consume and the various gases present in a graveyard. Nevertheless the hive never falls into ruin or disarray. When an intruder appears, the hive is immediately at full alert and goes into attack mode without so much as a whisper. Many a pony has already found themselves thinking they just walked into a zombie pony attack when the coffin lid next to them flew off with a loud hiss. One should take special precautions when a full moon is out. For some reason, it sends the Swarm into even more of a trance and a strange sort of dancing motion above the graveyard it currently resides in. Any intruder is immediately killed on sight, but one can usually tell and avoid these events by keeping a lookout for red eyes dancing in the sky like fireflies.

QUEEN MYXINE- HAGFISH SWARM (sapphire)

Myxine is somewhat strict. This Swarm lives in hollowed out caves along the shore. Usually they would either play the drowning to be saved, or save the drowning, as they mostly do now. Sometimes they would build sharp spires underwater and try to navigate ships into them. Sometimes they’re lazy and just simulate a shark attack by swimming with their horn looking up over the water like a shark fin. They are a pretty small Swarm as ponies aren't all that big on seafaring. Overall they’re pretty pragmatic and a direct contrast to the Honeycomb Swarm’s song and dance.

QUEEN AMBROSIA- HONEYCOMB SWARM (yellow)

The Honeycomb Swarm is known to prefer hot and humid areas of the Everfree. In contrast to other Swarms they don’t necessarily build their lair as a city, but may simply hollow out trees. Their favorite method of trapping ponies and other intruders was to disguise themselves as dancing females and to lure males into their sticky traps. They usually waited for their target to weaken inside the trap, so they can more easily apply hypnosis spells. If they are not outside dancing and creature walks into a trap all by its own, it may take a worker weeks to notice it, which usually leaves a lot of creatures to die in the humid heat. Their queen, Ambrosia, is quite curious and rather playful, but often will harm her victims that way cause she has no concept of, and doesn't care about their natural limits. Some ponies say she is rather beautiful - for a changeling.

THE FLITTERWINGS

Changelings are part of a larger group of four insect-winged pony types, known as Flitterwings. all share the same taste in food.

FLUTTER PONIES
mostly despised by the others for thinking themselves superior, the flutter ponies disappeared long ago.

GLAMOURLINGS

Close relatives of the changelings, glamourlings are narcissistic creatures who tend to value their well-being over all others. They are more 'beautiful' than changelings; with lithe and sleek white bodies. What sets them the most apart is their abilities. While Changelings can change their own forms, the glamourlings use 'illusions' to project hallucinations over those they have a grudge against, confounding them in their memories and tormenting them without ever getting their hooves dirty. their leader is known as the Shahbanu, or "Queen of queens." (pictured)

They also are huge lovers of 'mirrors', hence their affinity for crystals and polished rocks and sparkling minerals. The 'Crystalline Raj' is an isolationist nation and has thus far been keen to avoid entangling itself with much of Equestria.

PUKA
Flightless, shaggy, short, with long tails and short horns, Puka can shapeshift and teleport, but little else. they live in cold climates.

Blackshells belong to Reddened Chaos Myrrh belongs to http://fateomega.deviantart.com, Ambrosia, Myxine, and Miasma belong to http://siansaar.deviantart.com, glamourlings belong to http://lionel23.deviantart.com, all others belong to me or Lauren Faust and Hasbro.

So, two things:
One, as this is not the same style of changelings as described in main part of the Changelings and You group (that is to say, my personal interpretation) this does need to be labeled as a different type.
Alternate worlds and all.

Secondly, did you do this artwork yourself? If so, I may have a favor to ask.