Cliff Wright

Harry Potter and the Chamber of Secrets

Harry Potter and the Prisoner of Azkaban

Cliff Wright was the illustrator for the U.K. Editions of Harry Potter and the Chamber of Secrets and Harry Potter and the Prisoner of Azkaban. After the first book recognized success, Bloomsbury reached out to the experienced Cliff Wright to produce the illustrations for the second and third books. 

As portrayed in these examples, Cliff Wright is known for his depictions of Hedwig (first featured on Chamber of Secrets) and Buckbeak the Hippogriff (first featured on Prisoner of Azkaban).