Commonalities between parrot, platypus, and kangaroo:

- Toothless jaws: One common characteristic shared by parrots, platypus, and kangaroos is that they all have toothless jaws. Instead of teeth, they possess specialized adaptations for their respective diets.

- Functional post-end tail: Another similarity is the presence of a functional post-end tail in all three species. While the purpose of the tail may differ among them, it serves various functions such as balance, communication, and propulsion.

- Ovoparity: Parrots, platypus, and kangaroos are all oviparous, meaning they lay eggs as a method of reproduction. This is in contrast to viviparity, where offspring develop inside the mother's body.

- Homeothermy: The last common characteristic is homeothermy, which refers to the ability of these animals to maintain a constant internal body temperature regardless of external conditions. This is achieved through various physiological mechanisms such as thermoregulation.

Parrot:
- Parrots are a group of birds known for their vibrant plumage, ability to mimic sounds, and strong beaks.
- They have a specialized beak adapted for cracking open nuts, seeds, and fruits.
- Parrots are predominantly found in tropical and subtropical regions around the world.
- They are highly social animals that often form strong pair bonds and exhibit complex communication behaviors.

Platypus:
- The platypus is a unique mammal native to Australia, characterized by its duck-like bill, webbed feet, and ability to lay eggs.
- It is considered a monotreme, a group of mammals that lay eggs instead of giving birth to live young.
- Platypus are semi-aquatic creatures that inhabit freshwater rivers, streams, and lakes.
- They have a broad diet consisting of aquatic invertebrates, such as insects, worms, and small crustaceans.

Kangaroo:
- Kangaroos are marsupials found primarily in Australia and New Guinea.
- They are characterized by their powerful hind legs, long tail, and ability to hop.
- Kangaroos have a unique reproductive system where females have a pouch, called a marsupium, in which they carry and nurse their undeveloped young, called joeys.
- They are herbivorous animals that feed on a variety of grasses and plants.

Overall, parrots, platypus, and kangaroos share several commonalities, including toothless jaws, functional post-end tails, oviparity, and homeothermy. However, they also exhibit distinct features and adaptations specific to their respective habitats and lifestyles.

Homeothermy