In biology, a “normal species” refers to a species that displays the typical or expected range of characteristics for its taxonomic group. It essentially conforms to the general average or norm of its classification.
A Subjective Concept
The term is often used comparatively. Within a group of closely related species, one may stand out because of unique adaptations, appearance, or behavior, and could be viewed as “abnormal” next to its more typical counterparts.
However, “normal” is context-dependent and influenced by human perspectives. What is normal in one environment or for one species may not apply elsewhere, and the concept does not always align with the natural diversity found in nature.