Prototype Inheritance Mentioning

Tell us what’s happening:

Hey guys,
I don’t understand what makes the computer relate the supertype Animal and the subtypes Bird and Dog.
How is the describe method from the Animal prototype contained in the Dog and Bird prototypes if Animal isn’t mentioned in them?

Thanks In Advance :slight_smile:

Code From Explanation

function Animal() { };

Animal.prototype = {
  constructor: Animal, 
  describe: function() {
    console.log("My name is " +;

Bird.prototype = {
  constructor: Bird

Dog.prototype = {
  constructor: Dog

Challenge: Use Inheritance So You Don’t Repeat Yourself

Link to the challenge: