how was it used during ancient times ?
Organisms were first classified by Aristotle  during his stay on the Island of Lesbos. He classified beings by their parts, or in modern terms "attributes", such as having live birth, having four legs, laying eggs, having blood, or being warm-bodied.
Taxonomy (biology)
Organisms were first classified by Aristotle (Greece, 384–322 BC) during his stay on the Island of Lesbos. He classified beings by their parts, or in modern terms "attributes", such as having live birth, having four legs, laying eggs, having blood, or being warm-bodied.
in the modern classification system birds are in a separate UNANSWERABLE what is taxonomy ? In biology, taxonomyis the scientific study of naming, defining (circumscribing) and classifying groups of biological organisms based on shared characteristics. who developed it ? Carl Linnaeus. what are its applications ? The work conducted by taxonomists is essential for the study of biodiversity and the resulting field of conservation biology.
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Taxonomy (biology) [SEP] Ancient times
Organisms were first classified by Aristotle (Greece, 384–322 BC) during his stay on the Island of Lesbos. He classified beings by their parts, or in modern terms "attributes", such as having live birth, having four legs, laying eggs, having blood, or being warm-bodied. He divided all living things into two groups: plants and animals. Some of his groups of animals, such as "Anhaima" (animals without blood, translated as invertebrates) and "Enhaima" (animals with blood, roughly the vertebrates), as well as groups like the sharks and cetaceans, are still commonly used today. His student Theophrastus (Greece, 370–285 BC) carried on this tradition, mentioning some 500 plants and their uses in his "Historia Plantarum".