Ecologists have so far known, found and certified a large number of species in the plant and animal kingdom. In terms of members, the largest found and identified so far are from among the

Among described and certified species, insects far outnumber other groups. Entomological surveys and reviews report more than a million described insect species worldwide, making Insecta the predominant component of global biodiversity and accounting for well over half of known living organisms; estimates of total extant insect species extend into the millions, underscoring their dominance among described taxa [1]. Regional data also reflect this pattern: for example, India alone has about 50,000 recorded insect species, a number far larger than recorded mammals, birds or plants, illustrating insects’ preponderance in species counts at multiple scales [2]. Therefore, insects represent the largest group in terms of identified members.

Sources

1. [1] https://www.sciencedirect.com/topics/immunology-and-microbiology/insect
2. [2] Environment and Ecology, Majid Hussain (Access publishing 3rd ed.) > Chapter 4: BIODIVERSITY > IndIA – A MegA-BIodIversIty nAtIon. > p. 22