Sometimes a sudden shift in color can be used to startle potential predators or threaten intruders.
For many animals, this would be too dangerous, because watering holes are ideal places for predators to ambush their prey.
On the vast savanna and grassland in the Africa, predators adore solitary life, rater, most of the herbivores prefer living in groups.
One is that their brains and hormones change to enhance their abilities to fend off predators, leave the nest to find food and return quickly so their young aren't attacked.
Traps for predators were set around the perimeter.
Their backs ooze a slimy neurotoxin that is meant to keep predators away.
The fish most at risk are predators high in the pelagic food chain, such as swordfish and sharks (see chart).
Trouble has closed in on these mammals in the form of equally warm-blooded and even more efficient and adaptable predators, humans.
Young birds are very vulnerable to predators.
The Monarch Butterfly's colorful markings also flaunt its poisonous nature; their purpose is attained when predators are deterred.
The peacock develops its glorious plumage to attract females, but it also makes him very conspicuous to predators and is often the cause of his downfall.
In some Australian species, the attending ants even build thatched or earthen corrals to contain the caterpillars. By day the caterpillars are protected from predators by the corral and the ants.
Some ammonite fossils have tooth marks that look as though they were made by huge reptilian predators called mosasaurs.
Elephants, which have no predators, must roam widely to get their daily ration of as much as 52 gallons (200 litres) of water and about 300 kilograms (660 pounds) of grass, leaves and twigs.
A sea urchin's long, moveable spines protect it from predators in the waters off Hawaii.
Though these predators are best known for ensnaring their food in sticky webs and paralyzing them with venom, this is only one of many ways the world's 40,000 or so known spider species catch a meal.
Dr Cappuccino and Dr Arnason suspected this might be because native predators are sometimes "pre-adapted" to the aliens' defences, but in other cases they are not.
On the one hand, cats are predators, but on the other, they're small enough to be prey.
Faye Archell, or the Centre of Applied Zoologym said: 'Many species of Angler Fish are what are known as ambush predators.
The bright red color of a fire urchin warns predators that its spines are poisonous.
The bright red color of a fire urchin warns predators that its spines are poisonous. Sea otters are the major predators of sea urchins.
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