Download Animal defenses by Christina Wilsdon PDF

By Christina Wilsdon

Bugs that seem like leaves, snakes that play lifeless, fish that fly, and toads with toxic dermis - those animals are one of many creatures that guard themselves in attention-grabbing methods. virtually each animal is hunted as nutrients through another type of animal and has built how one can shield itself opposed to predators. "Animal Defenses" provides the wide range of actual and behavioral variations utilized by animals of their fight to outlive and indicates how scientists proceed to make new discoveries in regards to the age-old maneuvering among predator and prey.

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Many poisonous animals produce foul fluids that cling to the predator or entrap it. The pill millipede, for example, oozes sticky droplets when it is attacked. The droplets stick to predators such as ants. As the ants frantically try to clean off the fluid, they gum themselves up even more. Meanwhile, the millipede escapes. A spider that eats a pill millipede will be paralyzed for several days. The poison even can affect birds and mice. Some animals’ poison can kill predators. A few species of millipedes, for example, ooze droplets that release a poisonous gas called hydrogen cyanide.

In Africa, the shovel-snouted snake coils its tail, too. Other kinds of snakes even jab their tails at their attackers as if they were going to bite them. Escape Artists 33 Tail markings are common among animals, and some scientists are taking a second look at them to see which ones may be used as deflection displays. The black tip on a weasel’s tail, for example, may help trick a hawk into trying to grab the skinny tail instead of the body or head. LOSING LIMBS AND TAILS Some animals whose tails are grabbed have a surprise in store for their attackers.

However, a predator that grabs a bird’s tail is often left with a mouthful of feathers. This feather loss is called fright molting. Some scientists think it may help a bird wriggle out of the clutches of an owl or other predator, just as a butterfly sheds wing scales as it struggles to escape a spider’s web. They also think that a bird can fright molt in midair, leaving a burst of feathers behind it that might deflect a hawk’s attack. Though many animals lose parts of their outsides to defend themselves, some species of sea cucumbers lose their insides instead.

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