Land Before Time Wiki
Land Before Time Wiki
Ducky and Spike's Mother






Brown, w. lighter brown underbelly

Eye color



Disputed; official IDs for her daughter are:


Tall grass

Voice actor

Tress MacNeille (II-XI, TV series)
Meghan Strange (XIV)

First appearance

The Land Before Time

Last appearance


Ducky's Mother, known as Mama Swimmer[4] or Mrs. Swimmer by fans, and Ducky Mom by Petrie in the eighth movie, is Ducky's mother and Spike's adopted mother, and is a brown saurolophus who has appeared in most of the fourteen movies in the series.

She isn't prejudiced against other species, as seen in her inter-species adoption of Spike, a Stegosaurus whom she took in as her own son due to the whereabouts of his own parents being unknown. She loves all her children and is very attentive. She is popular among Littlefoot and his friends for these reasons and is treated with respect by Littlefoot and his friends, as well as the adults in the Great Valley. She occasionally has doubts on how to raise Spike, whether in keeping with her own values or with those of his racial heritage. This was seen in The Land Before Time VIII: The Big Freeze when a stegosaur herd met and befriended Spike. She let him go with the herd to learn "his kind's" ways; however when Spike fell through the ice it was she who rescued her grateful son.

This protective attitude is scientifically accurate, as at least some hadrosaurids such as Maiasaura, or "good mother lizard," are believed to have been attentive parents. Curiously, unlike other young dinosaurs in the film, her daughter, Ducky, is shown as being able to walk and even talk soon after hatching, while the evidence for hadrosaur parental care rests in the fact that young were unable to care for themselves.

She is voiced by Tress MacNeille, who also voices Petrie's Mother in the films, and currently by Meghan Strange, who also voices Ruby.


Mama Swimmer is a hadrosaur (or duck-billed dinosaur), very physically similar to Saurolophus. She has black eyes. She has a brown skin. The underside of her tail, her belly, her chest, and her throat are lighter brown.



  1. The Land Before Time May 11, 1987 script excerpt:
    "A single egg, rocks and bounces; a tail breaks through the shell, then a head. It is a tiny, female Anatosaurus (DUCKY)."
  2. Ducky species on LBT1 DVD.png
  3. Ducky Is a Saurolophus.png
  4. The Land Before Time: The Gang at Retrieved on March 17th, 2009.

Main family members in The Land Before Time
Grandma and Grandpa Longneck | Ali | Bron | Littlefoot's Mother | Shorty | Old One | Ali's Mother | Daddy Topps | Cera's Mother | Dinah & Dana | Tria | Cera's Siblings | Tricia | Mama Swimmer | Papa Swimmer | Ducky and Spike's Siblings | Mama Flyer | Petrie's Siblings | Pterano | Papa Sharptooth | Mama Sharptooth | Ruby's Parents | Ruby's Siblings |
See Also
Main characters