Who is alfred wallace

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During that time, he gathered over , specimens. His research on the geographic distribution of animals provided critical support for his evolutionary theories and led him to draw a boundary line through Southeast Asia that divides Asian and Australian animal groups. It signifies the unexpected distribution of animals on either side of the line. Several mammal , bird, and fish species are found in abundance on one side of the line and only in small numbers, or not at all, on the other side.

Wallace wrote over 20 books and published more than articles and letters on a wide variety of topics. He died in at the age of Female mammals produce milk to feed their offspring. The audio, illustrations, photos, and videos are credited beneath the media asset, except for promotional images, which generally link to another page that contains the media credit.

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They will best know the preferred format. When you reach out to them, you will need the page title, URL, and the date you accessed the resource. Wallace worked around the world gathering evidence to support his evolutionary theory.

He is best known for studying warning colouration in animals, one example being the golden birdwing butterfly Ornithoptera croesus , as well as his theory of speciation. After a variety of zoological discoveries, Wallace proposed a theory of evolution which matched the unpublished ideas Darwin had kept secret for nearly 20 years.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 I got interested and became absorbed by the man, like so many other individuals have been. There is a sort of secret society of Wallace fans.

Mention his name and you create a frisson of interest among these people. I have tried to get over the feeling of the excitement that is evoked by his name in our programmes. Wallace was born in Usk, Monmouthshire, to middle-class parents, but was forced to leave school at 13 when the family fell on hard times.

He worked as a surveyor before deciding to travel to the Amazon to collect specimens and to work as a naturalist. After four years, with his health deteriorating, he sailed home. Twenty-six days out of port, his ship caught fire and his drawings, most of his notes and his collection of specimens were destroyed.

Wallace survived, in an open lifeboat, with only a couple of notebooks and an indignant parrot. Two years later, Wallace left Britain again.