When Bertha Bear's birthday party is interrupted by a pesky fly, she races off in pursuit of it and disturbs a number of animals along the way.
- ISBN10 0606242317
- ISBN13 9780606242318
- Publish Date 1 December 2001 (first published 1 April 1997)
- Publish Status Out of Print
- Out of Print 19 July 2021
- Imprint Turtleback Books
- Edition Turtleback School & Library ed.
- Format Hardcover
- Language English