Creature

A creature is an organic life form found on a planet. A constant struggle for survival is present.

Evolution
One thing all creatures share in common is Darwinian evolution. In the wilderness, a cycle occurs where creatures can change via genetic mutation. If such trait proves to be desirable, they pass it on to few generations while those with the unfavorable traits die out. Such principle applies from the microbial level to interstellar empires battle it out.

The most intelligent of creatures tend to be predators. In order to catch their prey, they have to rely on cunning intellect and stealth, while an herbivore only has to know how to run. As a result, some animals have evolved to live in packs and to hunt cooperatively to ensure their own survival.

Ways to gather energy
Every organic life form needs a form of energy in order to sustain itself.


 * Autotrophic - The way most plants gather energy, but some animals can do this to. Trees, flowers and grass are examples of autotrophic plants, and an example of an autotrophic animals is the Elysia chlorotica, a photosynthetic slug.


 * Herbivore - A creature that feeds on plants. Examples include rabbits, elephants, deer and cows. Some plants can "eat" other plants such as the kudzu vine which drains the nutrients around trees.


 * Carnivore - A creature that feeds on other animals. Examples include foxes, wolves, cats and lions. Some plants can be carnivorous such as the Venus flytrap or the pitcher plant.


 * Omnivore - A creature capable of consuming both plants and animals. Examples include apes, bears and ravens.


 * Decomposer - A creature that feeds off the dead remains of other animals, breaking them down into nutrients to be recycled. Many types of fungi such as mushroom are this.

Feeding methods

 * Opportunistic - A creature that feeds on whatever available food it stumbles upon.


 * Seeker - A creature that actively seeks out food.