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American animals ants Aristotle aroid Asa Gray astronomers Audubon autumn bacteria bank swallows beauty bees beetles biological birds blue bobolinks born butterflies cell cicadas cold color creatures cricket crystal dark Darwin dead death earth eggs evolution eyes feel female ferns fields flowers forest frog fungi fungus Gilbert White grackles grass gray green hear hour human insects instinct Lamarck larvae leaf leaves lichens light Linnaeus living look males mammals marsh mate mechanists migration mind moth natural selection naturalist Nature nest never night odor orchid parasite plants poet pollen pond protoplasm Rafinesque rain scientist seed seems sing sleep smell snow song soul sound species spores spring stars summer sunlight surface tension swallows sweet things tion tree tropics tropism turn vitalists wild wind window wings winter wood frog woods yellow