Darwin and Wallace
Alfred Russel Wallace was a great admirer of Darwin and a fellow naturalist, who independently proposed the theory of evolution by natural selection. Wallace produced scientific journals with Darwin in 1858, which prompted Darwin to publish On the Origin of Species the following year.
Wallace worked around the world gathering evidence to support his evolutionary theory. He is best known for studying warning colouration in animals, and examples include the Golden Birdwing Butterfly (Ornithoptera croesus) and his theory of The formation of new and distinct species in the course of evolution..
After a variety of zoological discoveries Wallace proposed a theory of evolution, which matched Darwin's unpublished ideas that he had kept secret for nearly 20 years. This encouraged Darwin to collect his scientific ideas and collaborate with Wallace. They published their scientific ideas jointly in 1858.