The commonest forms of amateur natural history in the United States are probably gardening, bird watching, the maintenance of aquarium fish, and nature photography.
Marston BatesThe parasite that causes malaria edges through the cells of the stomach wall of the mosquito and forms a cyst which grows and eventually bursts to release hundreds of sporozoites into the body cavity of the mosquito ... As far as we can tell, the parasite does not harm the mosquito ... It has always seemed to me, though, that these growing cysts ... must at least give the mosquito something corresponding to a stomach-ache.
Marston BatesNatural history is not equivalent to biology. Biology is the study of life. Natural history is the study of animals and plants-of organisms. Biology thus includes natural history, and much else besides.
Marston BatesOne dictionary that I consulted remarks that "natural history" now commonly means the study of animals and plants "in a popular and superficial way," meaning popular and superficial to be equally damning adjectives. This is related to the current tendency in the biological sciences to label every subdivision of science with a name derived from the Greek. "Ecology" is erudite and profound; while "natural history" is popular and superficial. Though, as far as I can see, both labels apply to just about the same package of goods.
Marston Bates