Here is his description in the book he appears in:
"The kitchen talents have many specialties, and Dewberry's is fruits. This kindhearted sparrow man is an expert on strawberries. He can take one look at a plump, red strawberry and tell you exactly how it weighs, what it will taste like, and even how many seeds it has. From his walls to his slippers, everything in Dewberry's room is decorated in strawberry red. When he's not growing, harvesting, or preparing strawberries, Dewberry is writing an epic poem . . . about strawberries!"