Given this paragraph, what method of scientific study did Edmund Selous champion?
Edmund Selous started as a conventional naturalist, but developed a hatred of the killing of animals for scientific study and was a pioneer of bird-watching as a method of scientific study. He was a strong proponent of non-destructive bird-study as opposed to the collection of skins and eggs.
Edmund Selous was a pioneer of bird-watching as a method of scientific study.
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Edmund Selous started as a conventional naturalist, but developed a hatred of the killing of animals for scientific study and was a pioneer of bird-watching as a method of scientific study. He was a strong proponent of non-destructive bird-study as opposed to the collection of skins and eggs.
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Answer the following query.
Given this paragraph, what method of scientific study did Edmund Selous champion?

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Edmund Selous was a pioneer of bird-watching as a method of scientific study.
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