They are James Potter,
As a pack animal, or as a “lone wolf,” the wolf is a perfect fit for Harry's Animagus form.
Rita Skeeter could do it. But Harry, Ron and Hermione never got around to turning themselves into animals.
“A creature I wouldn't want to kiss . . . a spider!” Harry figures out the riddle, and realizes that a spider is about to attack. But what he doesn't realize is what I now believe: that the spider in the maze is Professor Snape, in his Animagus form. It is Spider/Snape who bears down on Cedric and Harry.
Animagus. Lily's animagus form is a Doe, coupling with her husband, James Potter who is a Stag. Severus Snape's animagus is also a Doe.
Draco is not an animagus in the story. However, if he were to become one, I believe he would be a Siamese cat. His belief in his superiority and his snobbish manner line up with Siamese traits, but he, like the cats, loves his family deeply.
For example: if Viktor Krum can transfigure his head into a shark's, like he does in Goblet of Fire, that doesn't mean he is an Animagus. Transfiguration is a form of spell-casting, whereas becoming an Animagus is forever. And yes, he could turn into a falcon.
Peter Pettigrew's Animagus form was a rat. Colloquially, a "rat" is a snitch or informant. Webster's also lists the following possible definition: "a contemptible person: such as... one who betrays or deserts friends or associates."
James Potter, Sirius Black, and Peter Pettigrew all became Animagi after discovering that their friend Remus Lupin was a Werewolf. Because a werewolf is only a danger to humans, they decided that they could keep him company during his transformations by turning into animals.
Following both ordeals, Ginny grew into a confident young woman. Her and her friends followed in the footsteps of a previous generation, completely unbeknownst to them, and became Animagi at the age of fourteen, to support their best friend, Maisie Cattermole. Ginny took the form of a grey mare.
Ron (Ant that has wings) - Loyal to the queen, and willing to die to save the queen as well. Also quite social.
No, an animagi can only attain one animal form, and if they could attain more than one, than Pettigrew would probably have tried to change into a different animal after Sirius was after him so that he wouldn't know it was Pettigrew, since Pettigrew is recognizable as a rat without one of its front fingers.
They are James Potter, Sirius, Wormtail, Skeeter, McGonagall, Talbott Winger, and an unnamed witch who can turn into a cat. The fact that there are so few Animagi just causes us fans to want to know more about them. After all, they are some of the most unique characters in all of Harry Potter.
Sirius Black and James Potter attended Hogwarts together, and Sirius is Harry's godfather. Sirius is an Animagus, which means he can transform himself into a black, shaggy dog named Padfoot at will.
At the end of GOF only a handful of people even know that Sirius is an animagus, let alone his loveable big doggie form. But by the beginning of OOTP we have Lucius Malfoy able to "recognize" Sirius by seeing the large black dog with Harry.
Was Voldemort an Animagus? No, Voldemort was not an Animagus. He didn't see any reason to become an Animagus despite being a gifted wizard and knowing a lot of magic. This may simply be because his sole purpose was to obtain immortality and become the strongest wizard who could control the world around him.
James's Animagus form was that of a stag, which earned him his nickname, Prongs. Strikingly, Harry's Patronus was a stag and his mother Lily's was a doe, a female deer, showing that the family's characters were in harmony and formed part of the same animal group.
Also one's Patronus and Animagus forms can be the same. So by that logic it is fairly plausible that Dumbledore's Animagus form could have been a Phoenix.
Nymphadora Tonks, who we first meet in Harry Potter and the Order of the Phoenix, is a Metamorphmagus. She tells Harry that the ability helped her greatly in the Concealment and Disguise in her Auror training.
Known Animagi
Falco Aesalon — Falcon; the first recorded Animagus; the registration system was not in existence in his time.
Sirius's early life proved unhappy; he had come to hate most of his relatives, in particular his mother. He rejected his family's pure-blood elitism and reverence for the Dark Arts. At Hogwarts, rather than be sorted into Slytherin like the rest of his family, Sirius was placed in Gryffindor.
…in Transfiguration and Potions at least. Becoming an Animagus requires a witch or wizard to be skilled in both these areas in order to stand a chance of achieving such a complex transformation.
Godric Gryffindor never died. He is an animagus that took the form of a phoenix and can no longer transform back to his human form due to it being so old.
Did Dumbledore know the Marauders were unregistered animagi? No, he didn't until very much later. James, Sirius and Peter turned themselves into Animagi without the knowledge of the wise old headmaster.
The rare forms include creatures like hippogriffs, unicorns and thestrals, which don't seem like viable Animagus forms. It's not impossible, but it just doesn't seem too plausible that someone could transform into a dragon.