Some species of animals who doesn`t show their intelligence towards humans are reptiles, worms and other invertebrates. May be they do but we still cannot notice their intelligence.
I think that mainly animals are intelligent, even if we don`t see this fact, it doesn`t mean that they are not, may be we are not so intelligent to understand them. But we have to remember even if animals are intelligent they still have their reflexes and instincts which can be switched on at any time and activate the dangerous situation for the human`s life.
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