Human aspects of animals

Man is accustomed to always viewing himself as the highest being in the universe, seeing himself as the most beautiful, wisest, and most intelligent. He also uses his feelings as a measure of the feelings of others, describing them as humane, while the opposite describes them as animalistic. It is as if man characterizes himself as tender of feelings, and describes animals as harsh. Is this true?
In this book, chapters from the book "Human Aspects of Animals," the author presents many anecdotes about the behavior of different animals, drawn from the experiences of a team of scientists and researchers in their attempts to measure the "intelligence factor" of animals, as well as adding to them from his own observations.
The book focused on animal instinct and its role in its behavior, and relied on laboratory experiments that attempted to test the ability of animals to learn and acquire special skills, through trial and error. It was proven in all of these experiments that animal behavior is linked to an instinctive stimulus, such as hunger, thirst, or desire. Sexual or maternal affection.