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Cross-Species Switches were a type of Transfiguration that was caused when transforming spells were modified in certain ways.[1] They were presumably a type of Switching Spell that changed certain aspects of different species and may therefore have been Trans-Species Transformation.

History

During the 1991–1992 school year, the following problem about Cross-Species Switches could be seen on the blackboard in the Transfiguration Classroom:

If bodyweight is A, viciousness is V, intended transformation is T, wand power is W and concentration is C, and assuming T=(W×C)÷(V×A)×Z, then what does Z equal?[2]

During the 1994–1995 school year, the fourth-year Transfiguration students at Hogwarts School of Witchcraft and Wizardry were given homework on Cross-Species Switches, with one question being:

Describe, with examples, the ways in which Transforming Spells must be adapted when performing Cross-Species Switches.[1]

Nature

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

Appearances

Notes and references

Transfiguration (class)
COS Vera Verto demo.gif
Branches of Transfiguration Transformation · Vanishment · Conjuration · Untransfiguration
Notable 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) · Partial Vanishment · Reparifarge · Softening Charm (Spongify) · Switching Spell · Vanishing Spell (Evanesco)
Conjuring Spells Bird-Conjuring Charm (Avis) · Inanimatus Conjurus Spell · Bouquet Spell (Orchideous) · Snake Summons Spell (Serpensortia)
Transforming Spells Animal to Water Goblet (Vera Verto) · Armadillo to Pillow · Bowling Ball to Balloon · Beetle to Button · Cauldron to Badger · Cat to Cauldron (Felifors) · Cauldron Cakes to Cabbages · Chair to Cat · Cross-Species Switches · Desk Into Pig · Fairy Cakes to Fairies · Feather Duster to Ferret · Ferret to Feather Duster · Goldfinch to Golden Snitch · Flobberworm to Fritter · Gnomes to Lawn Gnomes · Guinea Fowl to Guinea Pig · Gobstone to Skunk · Hedgehog to Pin Cushion · Lovebird to Love Note · Match to Needle · Meddling Man to Monkey · Mice to Snuffboxes · Owl to Opera Glasses (Strigiforma) · Pawn to Queen · Porcupine to Pin Cushion (Hystrifors) · Puffskein to Paperweight · 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 into Gerbil · Teacup to Rat · Teapot to Tortoise · Thimble to Thestral · Toad to Toadstool · Tortoise to Trumpet · White Rabbits to Slippers
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