There are millions of different types of living things on Earth. In order to keep track of them all, scientists put living things into groups based on characteristics that they have that are the same.

Bats, rodents, hedgehogs, and shrews are mammals among the orders that are predicted to have the most undescribed mammals. (Pictured: a bicolored shrew) Werner Korschinsky via Wikimedia Commons under ...

Principles of taxonomy -- Formal classification of mammalia -- Review of mammalian classification -- Bibliography -- Index to technical names -- Index to vernacular names siris_sil_16894 ...

Yes and no: It depends on how you classify animals. There are two main classification systems – the Linnaean system which groups organisms by characteristics and the phylogenetics system, which ...