Doctor Dolittle's Caravan
Hugh Lofting
 Pippinella is special in that she possesses what is generally assumed to be an exclusive trait of male canaries: birdsong. Ultimately, Doctor Dolittle creates a "Canary Opera" (using canaries and other bird species as well), based on Pippinella's life story. This opera, jointly composed by both the Doctor and Pippinella, becomes an overwhelming success in London. The novel disrupts the chronological order of the series, with events occurring between Doctor Dolittle's Circus and The Voyages of Doctor Dolittle despite the book's publication between Doctor Dolittle's Zoo and Doctor Dolittle's Garden. This book is the follow-up to Doctor Dolittle's Circus, for the Doctor (at this point in time) is still operating the circus he inherited from the runaway former owner, Albert Blossom. Pippinella's eventual fate, and Doctor Dolittle's final adventures with her, are ultimately revealed in the much later book, Doctor Dolittle and the Green Canary.