A group of animals, plants, or other living things that all have similar traits and are categorized as one species are considered to be living organisms.
All humans are one species, for instance.
A group of creatures that can breed with one another in nature and create healthy offspring is referred to as a biological species.
Since 1500, it is estimated that 900 species have vanished.
Our estimations are probably more precise for the taxonomic groups that have been researched more thoroughly.
85 mammals, 159 birds, 35 amphibians, and 80 fish species are included.