Species Definition Quotes

The human race is a zone of living things that should be defined by tracing its confines.

A creationist can embarrass an evolutionist by asking for a definition of species.

It is really laughable to see what different ideas are prominent in various naturalists' minds, when they speak of 'species'; in some, resemblance is everything and descent of little weight-in some, resemblance seems to go for nothing, and Creation the reigning idea-in some, descent is the key,-in some, sterility an unfailing test, with others it is not worth a farthing. It all comes, I believe, from trying to define the undefinable.

A species is a reproductive community of populations reproductively isolated from others that occupies a specific niche in nature.

Every reading is partial, but that does not absolve us from the quest for meaning, which defines us as a species.

A species consists of a group of populations which replace each other geographically or ecologically and of which the neighboring ones integrate or hybridise wherever they are in contact or which are potentially capable of doing so (with one or more of the populations) in those cases where contact is prevented by geographical or ecological barriers.

The thing that defines a species is that all members have the same addressing system for their DNA.