Even when in humanoid form, Changelings did not need to take in sustenance.
Changelings do not need to eat, but if required they can pretend to eat. Since, they are essentially gelatinous, they can hold chewed up food within a body cavity which they can excrete/ dispose of later.
Most changelings don't know they're changelings.
Though they may always feel somewhat different or removed from human life, most changelings are too young to understand who they truly are.
They don't. Changelings seem closer to a colony organism than anything else. Kind of like coral, or maybe a sea sponge. The colony doesn't directly reproduce, it just grows bigger as the microorganisms which make it up undergo mitosis.
Changelings are born into one of two paths. They may be born to two changeling parents, and raised with full understanding and acceptance of their nature from birth. Or they may be born to a mixed parentage, in which case they are often taught to conceal their true nature.
Changeling Reproduction
If a changeling with the Racial Emulation feat matches its subtype to that of a partner, a child resulting from the union will always be of that humanoid subtype. If a changeling in a female form conceives a child, she loses the ability to change her gender until after the child is born.
A changeling can't make the wings at all. If they had wings, like from a class feature or something, then they could look like an Aaracokra with wings because they will have those limbs at that point.
As crew members beamed on and off their ships, the computers recognized this new genetic code as "common biology" and integrated it into the DNA of every officer in the fleet. The Changelings wanted Jack because of they needed his Borg-altered DNA, though they later ended up acquiring this from Picard's body.
The Changelings were sent to retrieve Picard's body so that they could specifically remove parts of his parietal lobe—the part that was supposedly defective from Irumodic Syndrome.
Changelings have the unique ability to transform their body to look however they want, provided they keep the same arrangement of limbs they already possess. It is very rare to actually see a changeling in it's 'true' appearance. Even when disguised, changelings can instinctively recognize each other.
As for being tattooed, changelings can definitely be tattooed, and they can just as easily erase the tattoo with a moment's thought.
They have large colorless eyes circled by thick black rings. Their hair color is most commonly a light shade of silver followed by platinum and blonde. In rarer cases, their hair can be pale shades of green, pink, and blue. Similar to elves, changelings lack body and facial hair.
"A human child might be taken due to many factors: to act as a servant, the love of a human child, or malice. Most often it was thought that fairies exchanged the children.
Although they're not affected by sunlight at all, a Changeling's most common weakness are Gaggletacks (horseshoes made of pure iron), which reveals a changeling's true nature through physical contact of anywhere on the body.
Within this description there are variants of changelings that show subtle differences. Some have opalescence in their skin (as if it contains various colors instead of just being white) and their eyes can be completely black.
By RAW changelings revert when they DIE but not when they are unconscious (it would be hard to maintain a long term masquerade if you revert when you sleep!).
Sometimes changelings are old, nasty fairies who revel in the sorrow they cause; or fairies with prodigious appetites for human food or mortal breast milk. Sometimes the changelings are fairies so old and worn out that their kinfolk have left them behind, happy to be rid of them in exchange for a plump human child.
The true form of a changeling is a bit paler than a typical human with slightly elongated limbs. Their eyes are colorless and ringed by black as pictured in the artwork above by Julia Zhuravleva. They have no body hair, but the hair on their head can be platinum, white, or silver.
Star Trek: Picard Season 3 firmly established Jack Crusher as a significant character within the beloved franchise, placing him alongside the iconic figures of the series. As the son of the esteemed Jean-Luc Picard and Beverly Crusher, Jack (Ed Speleers) plays a crucial role in the Star Trek canon.
Being Picard's son made Jack a sort of human-borg hybrid, embedding a link to the collective Seven was once a part of in his very DNA. Seeing the two of them take to their own bridge after that found-family scene they shared in Episode 6 feels like a full circle moment.
As Troi immediately feared, it confirms that the Borg are innately part of Jack since his birth, thanks to his father, Admiral Jean-Luc Picard (Patrick Stewart). In fact, Jack Crusher is Vox of Borg.
Changelings have red blood like a majority of the other races. Bleeding around others may alert many that the Changeling is not of the same race (should the blood color vary). For this reason, a Changeling will usually choose to take the form of a race with red blood.
Languages: You can speak, read, and write Common and two other languages of your choice.
Powers and abilities
Shapeshifting – Changelings can appear human, and are capable of shifting between forms in order to feed. Sharp teeth – Changelings have a lamprey-like mouth covered in sharp teeth that allow them to feed on humans.