He was an English naturalist of the 19th century made an extensive study of nature for over 20 years.
He did the observations on animal distribution and the relationship between the living and extinct animals and finally found that the present living animals share similarities to some extent.
Ernst Mayr is regarded as Darwin of the 20th century.
He is referred to as the father of the 20th century because he contributed tons to science.
He was the number one evolutionary biologist in his time.