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Over 1.5 million living animal species have been described—of which around 1 million are insects—but it has been estimated there are over 7 million in total. Animals range in size from 8.5 millionths of a metre to 33.6 metres (110 ft) long and have complex interactions with each other and their environments, forming intricate food webs .
Some species-focused databases attempt to compile comprehensive data about particular species , while others focus on particular species attributes, such as checklists of species in a given area (FEOW) or the conservation status of species (CITES or IUCN Red List). Nomenclators act as summaries of taxonomic revisions and set a key between ...
Aaages; Adalia; Aiolocaria; Alloneda; Anatis; Anisolemnia; Anisosticta; Antineda; Anegleis; Aphidecta; Archegleis; Australoneda; Autotela; Bothrocalvia; Callicaria ...
In this list of birds by common name 11,278 extant and recently extinct (since 1500) bird species are recognised. [1] Species marked with a "†" are extinct.
CCCBDB: Computational Chemistry Comparison and Benchmark DataBase National Institute of Standards and Technology: gas phase molecules "CCCDBD" 2069 CCRIS Chemical Carcinogenesis Research Information System National Library of Medicine substances that affect tumors CCRIS from primary literature, reviewed by experts "CCRIS subset of PubChem ...
Range maps are provided wherever possible; if a range map is not available, a description of the crocodilian's range is provided. Ranges are based on the IUCN red list for that species unless otherwise noted. All extinct species or subspecies listed alongside extant species went extinct after 1500 CE, and are indicated by a dagger symbol ...
Version 2014.2 of the IUCN Red List of Threatened Species identified 4574 critically endangered species, subspecies, varieties, stocks, and subpopulations. For IUCN lists of critically endangered species by kingdom , see:
The order Primates consists of 505 extant species belonging to 81 genera. This does not include hybrid species or extinct prehistoric species. Modern molecular studies indicate that the 81 genera can be grouped into 16 families; these families are divided between two named suborders and are grouped in those suborders into named clades, and some of these families are subdivided into named ...