Harry's Wand is made of what Bird's Feather?

Harry's wand contains a phoenix feather, specifically from Fawkes, Dumbledore's phoenix. This rare wand core makes Harry's wand unusually powerful and creates a special connection with Voldemort's wand, which also contains a feather from the same phoenix. This twin-core relationship becomes crucial later in the series when their wands 'connect' during battles.