Birds on the Seventh Floor

On the Seventh Floor of Hogwarts is a birdcage that contained two birds, one white and one black. During the 1996–1997 school year, Draco Malfoy took each bird from their cage and used them to test out the Vanishing Cabinet that he was attempting to repair in the Room of Requirement. The white one was used first, and died when the test was unsuccessful. The black one was used next, and successfully traveled to the other Vanishing Cabinet in Borgin and Burkes and back again. Harry Potter and Ginny Weasley heard this bird fluttering inside the cabinet when they were attempting to hide the Half-Blood Prince's copy of Advanced Potion-Making, and set it free. We can see the birdcage also on the marauder's map.

Appearances

 * Harry Potter and the Half-Blood Prince (film) 
 * Harry Potter and the Half-Blood Prince (video game)