Bird-Conjuring Charm

Avis is a spell that conjures a flock of birds. The birds shoot from the caster's wand tip, accompanied by a loud blast that sounds like a gun being fired.

Known practitioners

 * Ollivander
 * Hermione Granger

History

 * This spell was used by Ollivander when testing the four Triwizard Tournament Champions' wands before their First Task. This is also possibly the spell that the Sixth year Charms students were learning to perform non-verbally in 1996.
 * Hermione Granger also used it the same year to conjure a flock of birds and made them attack Ron Weasley.

Etymology
The Latin word avis means "bird".

Appearances

 * Harry Potter and the Goblet of Fire
 * Harry Potter and the Half-Blood Prince
 * Harry Potter and the Half-Blood Prince (film)