Animals in the Railway Series
This section is for animals that first or only appeared in the Railway Series, listed in chronological order:
After her calf was taken to market, Bluebell mournfully trotted onto the bridge at Hawin Russagh, stopping Gordon and Henry from passing and she did not move until Percy came along with her calf in a cattle truck. Bluebell was happy to see her calf and they both sent away.
- In the Railway Series, Bluebell was white with black spots, but in the television series and a magazine story, she was brown.
An inquisitive bull who was angry, had once strayed from some farm labourers and ran away. He eventually came across the railway and seeing grass on either side, began to eat. Daisy tried to shoo him away, but was scared away by Champion and backed away, until Toby came and frightened him away.
- Hisao Egawa (Japan)
After Donald teased Duck about his "quacking", Duck's crew got revenge by slipping a small duckling into Donald's tender. When discovered, she became friends with Donald and his crew and eventually settled down at Haultraugh (Tidmouth Hault in the television series), where a small pond was nearby. She was named Dilly by the stationmaster, but she is known to everyone else as Donald's duck.
In an annual, she disappeared for a few months, only to return to the station with her husband and children in tow.
- In the fifth season song, Dilly is nicknamed "Quackeroo".
Animals in the television series
This section is for animals that only appeared in the television series:
Gordon had problems with his fire. The firelighter suggested it was caused by gremlins and Gordon later collected a special passenger. At Wellsworth, the passenger's Dalmatian ran away and ran into Thomas' cab after confronting a bull. At Brendam, Thomas enquired about the visitor and the Fat Controller revealed she was his mother, who then aptly renamed her dog "Gremlin". He also appeared near Callan station with two women as the Fat Controller drove by in his car.
- Gremlin's original name is not known, as it was never said.
When Allicia Botti came to Island of Sodor, Thomas was chosen to take her with Annie and Clarabel. While being cleaned, a strange squeak came from the coaches. It kept up as Thomas went to Brendam and when he arrived, it was found that a small mouse had found its way into Clarabel's compartment. Because Thomas did not feel important anymore, Percy took over. The mouse was given a mouse hole in Tidmouth Sheds and was named Allicia by Thomas.
Pegasus is a cart horse who lives on a farm near Dryaw Airfield. After he foolishly wandered into a ditch, Harold winched him to safety. However, Percy saw Pegasus being pulled through the air and thought that Pegasus was flying.
- A production made miniature model of Pegasus was sold to The Coffey Man Preservation from The Prop Gallery.
This section is for any other animals:
Thomas the Tiger
A Tiger and her two cubs appeared in Thomas and the Tiger. When the tiger's escape from the wildlife park, Thomas rescued them and returned them to the park. The wildlife keeper named one of the cubs Thomas, in honour of the tank engine.
Moby Dick is a goldfish belonging to a boy who lives near Shining Time Station. Stacy Jones sometimes looks after him whilst the boy is elsewhere. The only human that Moby Dick can communicate with is Mr. Conductor. His name is a play on the fictional sperm whale serving as the titular antagonist in Herman Melville's 1851 novel of the same name.
He only appeared in the film, Thomas and the Magic Railroad.