Errol

When J. K. Rowling first dreamt up Errol, she had in her mind a picture she had seen of "a very comical, large, fluffy, grey, bewildered-looking bird whose breed I had never known". When she first visited the aviary at Leavesden Studios, when Harry Potter and the Philosopher's Stone was being filmed, she saw a big line of great grey owls that were "an exact replica" of what she had in mind.