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Critter Fact Files and Short Courses

You have chosen a career to follow and prepare for, now it’s time to learn more about the species (and breeds) you will work with. ​Follow the 3 easy steps to help you read and learn more about the different critters, how to work with them, and how to gain experience, everything while having a huge amount of fun!

Definition of a Critter

The term “critter” is not part of the scientific taxonomy of species. But there are many small animals that have been tamed (and to some degree domesticated) by humans as pets.

The One Zoo Tree meaning of critter is therefore a living creature that many have as pets, either fully or partially domesticated or sufficiently tamed to stay with humans. All our critters can still be found in the wild.

List of different Critters

We currently have 8 different species, domesticated enough to be classified as Critters:

  • Chinchilla
  • Ferret
  • Gerbil
  • Guinea Pig
  • Hamster
  • Pigeon
  • Rabbit
  • Silkworm

If you want to contribute to the information on this Page, please click on the red beetle!

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Join the Critter Group

Status: Active

Learn even more about Critters by joining the CRITTER GROUP.

Members of the Group can create and discuss any critter related topic, as well as gain access to all the different Short Courses, win awards and meet other critter lovers from around the world. Gain experience points with each short course and compete for the top spot on the leader board!

Topics covered in the CRITTER GROUP:

  • General critter knowledge (Anatomy, Habitat, Behaviour, Diet, Ecological Benefits & Conservation)
  • Critter Care & Health
  • Creative (Including education, art, design, publishing, media, news and photography)
  • Species & Breeds (courses on over 20 different breeds)


This is also the place where you will find links to all of the Animal Organizations that work with critters. Join their special Groups and learn how you can gain valuable experience by volunteering or interning with them.

Profiles and Additional Resources

Career Mentors are Members who assist by volunteering to keep each Career Page factual and current while mentoring Students in the related Career Group.

Learn More …

Contributions by expert members are always appreciated to allow the students to make informed decisions. Please add your contribution through the attached form:

Contribution Form

List of Career Mentors/Educators who have contributed to this Career info:


One Zoo Tree

A few good pictures and photos of the different critter species: