He does not have a patronus, and has never been able to cast the spell.
This snake is also known as the Common European Adder. As you can see, the male adder (see linked photo in tl;dnr) fits well as Tom Marvolo Riddle's / Lord Voldemort's Patronus for a few reasons: Physical resemblance.
Voldemort's affinity for dark magic means he is not a threat to the Dementors and is why he can control them, so even though he does not produce a Patronus in the Harry Potter franchise, it does not mean that he cannot.
Voldemort *cannot* cast the Patronus Charm because, as he says in “Goblet of Fire,” Dementors are his and the Death Eaters' natural allies. Dark witches and wizards cannot produce a Patronus.
Snake. If voldy had a patronus it would be snake. Therefore it follows reason that if Bellatrix loved him, her patronus would be a snake too.
Foxes are cunning, resourceful and fiercely intelligent – remind you of anything? That's right – we wouldn't be surprised if some members of Slytherin house find themselves with a fox Patronus. Foxes are also highly adaptable and can live in many diverse habitats around the world.
1 Albatross
As the rarest Patronus in the Wizarding World possible, the Albatross represents an enormous bird that flies freely across any sea. This rare Patronus represents those who are simultaneously fearless, optimistic, happy-go-lucky, and ambitious.
In one of these newly minted futures, Albus is in Gryffindor when he goes to school. The reason why is shockingly mundane: His cousin bet that he couldn't get into the House if his life depended on it.
He truly believed the Elder Wand had to be passed down through murder, because that is what the legends say. But even if he knew that one only had to be disarmed, Voldemort was still too arrogant to do that. He kills anyone in his way.
When asked about what form Hagrid's Patronus takes, Rowling replied that Hagrid actually can't produce a Patronus because “it's a very difficult spell.”
When asked what shape Draco's Patronus Charm is, Rowling replied that, at least by the end of the sixth book, Draco was not capable of producing a Patronus, as it is not magic routinely taught at Hogwarts.
But when they went to Hogwarts, everything changed. The pair were parted when the Sorting Hat placed Severus in Slytherin and Lily in Gryffindor, and while Lily thrived in her new, magical life, Snape was essentially placed in close quarters with the likes of Lucius Malfoy, Avery and Mulciber.
1 Harry Potter's Stag
Harry's Patronus, a stag, is certainly the most prominent in the series (and among the best Patronuses in the Wizarding World), as well as the strongest Patronus in the films. Unlike many wizards, he could produce his Patronus at the age of thirteen, with guidance from Remus Lupin.
Tom Riddle – December 31
Capricorns have ambitious natures, as Riddle did during his years at Hogwarts, placed into Slytherin house.
Expecto Patronum, or the Patronus Charm, will cast a Patronus, which can appear as simply white vapour, or in more advanced casters, as a silvery-white animal shape. If it takes the shape of an animal, it is called a corporeal Patronus. This spell is used to ward off Dementors, which are the guardians of Azkaban.
' By his fourth year, Albus has got bigger plans than politely asking the Sorting Hat to take his choice into account. Using his full Slytherin cunning, he manages to get himself and Scorpius off of the Hogwarts Express, and into St Oswald's – no mean feat – and join forces with the alluring Delphi.
Harry Potter named his son after the character Professor Severus Snape in tribute to him dying for “for Harry out of love for Lily [Potter],”JK Rowling revealed on Friday.
Albus Severus is the main character in "Harry Potter and the Cursed Child." He's the ugly duckling of the family, is sorted into Slytherin, befriends Scorpius Malfoy, and isn't good at magic.
Elder. The rarest wand wood of all, and reputed to be deeply unlucky, the elder wand is trickier to master than any other. It contains powerful magic, but scorns to remain with any owner who is not the superior of his or her company; it takes a remarkable wizard to keep the elder wand for any length of time.
The Occamy patronus is most common in Ravenclaw and Gryffindor. Another unusual patronus in that it is most common in 2 completely different houses: Hufflepuff and Slytherin. A universal characteristic of those with the Basset Hound patronus is that they are smart.
While it's a lot of fun to find out which Patronus each character has, knowing that Hagrid doesn't have one—a fact Rowling revealed during a 2015 Q&A—is actually quite upsetting for fans.
At Hogwarts, she, along with her sisters, was sorted into Slytherin. It is suggested in the novels that, as a student, Bellatrix associated with a group of students – including Rodolphus Lestrange, Severus Snape, Avery, Evan Rosier and Wilkes – who nearly all became Death Eaters.
Harry Potter: Stag
Harry's patronus is undoubtedly the most recognizable. The stag is first seen in Harry Potter and the Prisoner of Azkaban when it saves Harry and Sirius Black (Gary Oldman) from the dementors at the lake.
Bellatrix Lestrange, Narcissa Malfoy, and Sirius Black are all descendants of Pollux Black, making them first cousins. Note: For space's sake, this tree doesn't include Andromeda Tonks or her husband and daughter. Sirius had good reason to avoid his relatives, as many in his family served as Death Eaters.