That is because, an association report in 2000 said, "the animal may perceive pain and distress after it is immobilized."

However, an assumption is made that at least one animal in the group did perceive and respond directly to the stimulus.

If a dominant animal perceives its status is being threatened, it will likely threaten the sub-dominant individual.

Just as smell is the principal means by which dogs and many other animals perceive their surroundings, sight is the primary information channel in humans.

It used groundbreaking effects and filming techniques to show how animals perceive the world around them.

His observations are generally limited to what an animal might actually perceive, yet there is never any sentimentality about the natural world.

So, an animal with eyes of a similar design to ours may perceive a much less detailed image than we do.

These animals perceive time very differently during their resting and active phases.

Many animals perceive their environment largely through their sense of smell.

It is yet unknown how the animals that gain a new photopigment are perceiving the new color.