This lesson contains 11 slides, with interactive quiz, text slides and 1 video.
Items in this lesson
Unit 1 understanding life systems
Slide 1 - Slide
Scientists classify animals by their physical characteristics
Predator: an animal that kills another animal for food
Prey: An animal killed by another animal for food
Slide 2 - Slide
Is an earth worm a predictor or prey?
Slide 3 - Quiz
Earthworms as prey
Earthworms are important prey for many animals such as birds and moles.
Eventhough Earthworms do not have special body parts to defend themselves, they are sensitive to vibrations. Once they feel movement around them they will crawl down quickly to hide themselves in the soil. They are also able to regenerate their body parts. So if their tale gets cut off, they can regrow it.
Slide 4 - Slide
Slide 5 - Video
A predator is an animal that hunts, catches and eats other animals. For example, a spider eating a fly caught at its web is a predator, or a pack of lions eating a buffalo. The animals that the predator hunts are called prey. A top predator or apex predator is one that is not the prey of other predators.
Slide 6 - Slide
Predators are usually carnivores (meat-eaters) or omnivores (eats plants and other animals). Predators will hunt other animals for food. Examples of predators are cats, crocodiles, snakes, raptors, wolves, killer whales, lobsters and sharks.
Ambush predators or sit-and-wait predators are carnivorous animals or other organisms, such as some carnivorous plants. They capture or trap prey by stealth or strategy (not conscious strategy), rather than just by speed or strength.
These organisms usually hide quiet and wait for prey to come within striking distance. They often are camouflaged, and may be solitary. This may be safer for the predator, because lying in wait exposes it less to its own predators.
When a predator cannot move faster than its preferred prey, ambushing its prey is likely to be more efficient than pursuit. Otherwise, active hunting commonly is more effective. There are however many intermediate strategies; for example when a pursuit predator is faster than its prey over a short distance, but not in a long chase, then either stalking or ambushing becomes necessary as part of the strategy.
Slide 7 - Slide
Can you think of some examples of predators?
Slide 8 - Slide
Prey may attempt to fool predators by becoming cryptic. These animals may have coloration that blends well with their background (camouflage), for example the females of many bird species. Others may freeze and remain quiet and still to blend in with their surroundings.
Examples: Cottontail Rabbit, White-Tailed Deer
Slide 9 - Slide
Protection in Numbers (Herding/Flocking):
Groups of animals living, feeding, or traveling together can escape predation in various ways. A group of animals can spot a predator more effectively than a single animal. This is called mutual vigilance. Upon attack, the group of prey animals may react by scattering, to confuse the predator; or they may even try to defend as a group, such as when a group of crows attacks an owl.