Is there any description in present day Evolution theory about Instincs in animal?

Question

Where did animals get Instinc?Any particular design in their system. was the design any good?
Is there any sciences which studies the design inherent in animals

Answer 1

You can find a pretty good article on Wikipedia about that
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Evolution
Konrad Z. Lorenz being followed by his imprinted geese
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Konrad Z. Lorenz being followed by his imprinted geese

Instinctive behavior can be demonstrated across much of the broad spectrum of animal life, down to bacteria that propel themselves toward beneficial substances, and away from repellent substances. According to Darwin's theory of evolution by natural selection, a favorable trait, such as an instinct, will be selected for through competition and improved survival rate of life forms possessing the instinct. Thus, for evolutionary biology, instincts can be explained in terms of behaviors that favor survival.

A good example of an immediate instinct for certain types of bird is imprinting. This is the behaviour that causes geese to follow around the first moving object that they encounter, as it tends to be their mother. Much work was done on this concept by the psychologist Konrad Lorenz. Evolution however encourages multiple instincts, exampled by the recent case of birds in England flying east for the winter, the result being that because of global warming these birds are now surviving at very high rates, further encouraging this behavior. They return home earlier after winter, get the best breeding grounds, encouraging more breeding by them than other birds, even further encouraging this instinct.
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Answer 2

Animals get instinct b/c when they have a mutation that favors a certain behavior, they survive, other behaviors don't help them survive so they get lost over time. Birds that have an instinct to hide when a hawk shaped shadow goes over them have a better chance to live than those that don't. Mice that are nervous and always checking their surroundings live longer than mice that just bumble along. So the next generation gets that behavior or is more likely to.

Answer 3

There is a science all about animals!!! ZOOLOGY!! Very good!! Instinct is just using past experiences to predict the near future, usually subconciously. Animals that have such abilities will survive and raise offspring of their own. Animals that do not have this ability will die and will not have children. Therefore animals will have this ability according to evolution!

Answer 4

All species have evolved to best fit their environment.

Answer 5

animals are smarter than we are.