cuniculi). Wry Neck, or head tilt, is when a rabbit's head starts to turn to the side. The rabbit will also lose it's balance and be very unstable. In later stages, the rabbit will walk in constant circles, to one side.
The living organisms that eat the producers are then considered to be the primary consumers, similarly to how the first person to buy a car is the primary consumer of that particular car. The primary consumers now have energy, and other organisms that are called secondary consumers can eat them. Secondary consumers are those organisms whose main food source is primary consumers. This is similar to you as the second consumer of the car. Even the secondary consumers have energy to pass on and can then be consumed by the tertiary consumer. These consumers are those who feed mostly on secondary consumers.
The consumers have three levels. The first level is the primary consumer. The primary consumer is also called a herbivore because they only eat the plants. An elk or a squirrel are both examples of primary consumers. The primary consumer will not eat other animals and only eats other plants and fruit.