Given this paragraph, what method of scientific study did Edmund Selous champion?
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.

### Instruction:
Given this paragraph, what method of scientific study did Edmund Selous champion?

### Input:
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.

### Response:

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.