Cross-Species Switches

Cross-Species Switches are a type of Transfiguration that is caused when Transforming spells are modified in certain ways^[1]. They are presumably a type of Switching Spell that changes certain aspects of different species and may therefore be Trans-Species Transformation.

History

The fourth year transfiguration students at Hogwarts School of Witchcraft and Wizardry were given homework on Cross-Species Switches, as listed below:

1. Describe, with examples, the ways in which Transforming Spells must be adapted when performing Cross-Species Switches^[1].
2. If bodyweight is A, viciousness is V, intended transformation is T, wand power is W and concentration is C, and assuming T=(WxC)/(VxA)xZ then what does Z equal?^[2]

Nature

It is easier to preform Cross-Species Switches when the creatures are similar in appearance or structure.

Appearances

• Harry Potter and the Philosopher's Stone (film) (First mentioned)
• Harry Potter and the Goblet of Fire (Mentioned only)

Notes and references

Transfiguration (class)
Branches of Transfiguration	Transformation · Vanishment · Conjuration · Untransfiguration
Known practitioners	Circe · Emeric Switch · Falco Aesalon · Mirabella Plunkett · Thaddeus Thurkell
Professors	Albus Dumbledore · Minerva McGonagall
Textbooks	A Beginner's Guide to Transfiguration · Intermediate Transfiguration · A Guide to Advanced Transfiguration
Transfiguration spells studied at Hogwarts
Colour Change Charm (Colovaria) · Change of hair colour and style (Crinus Muto) · Hardening Charm (Duro) · Mending Charm (Reparo) · Reparifarge · Softening Charm (Spongify) · Switching Spell · Vanishing Spell (Evanesco)
Conjuring Spells	Bird-Conjuring Charm (Avis) · Inanimatus Conjurus Spell · Orchideous · Snake Summons Spell (Serpentsortia)
Transforming Spells	Animal to Water Goblet (Vera Verto) · Beetle Buttons · Cat to Cauldron (Felifors) · Chair to cat · Cross-Species Switches · Desk Into Pig · Dinner plate to mushroom · Guinea fowl to guinea pig · Hedgehog to pincushion · Match to needle · Meddling Man to Monkey · Mice to Snuffboxes · Owl to Opera Glasses (Strigiforma) · Porcupine to Pin Cushion (Hystrifors) · Small Child to Rat · Small Object to Dragon (Draconifors) · Snail to Teapot · Target to Bird (Avifors) · Target to matchbox (Flintifors) · Target to Rabbit (Lapifors) · Teacup to Rat · Teapot to tortoise · White Rabbits to Slippers