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Insect population decline affects ecosystems, and other animal populations, including humans. Insects are at "the structural and functional base of many of the world's ecosystems." [6] A 2019 global review warned that, if not mitigated by decisive action, the decline would have a catastrophic impact on the planet's ecosystems. [6]
Insects — by country. Note: where an insect is found in a large number of countries on a continent, they are not categorized by each country — see/use: Category: Insects by continent . This is a container category .
With only 950,000 known non-insects, if the actual total number of insects is 5.5 million, they may represent over 80% of the total, and with only about 20,000 new species of all organisms being described each year, most insect species likely will remain undescribed, unless species descriptions greatly increase in rate.
Recent figures indicate that there are more than 1.4 billion insects for each human on the planet, [27] or roughly 10 19 (10 quintillion) individual living insects on the earth at any given time. [28] An article in The New York Times claimed that the world holds 300 pounds of insects for every pound of humans. [28]
Statistical subregions as defined by the United Nations Statistics Division [1]. This is the list of countries and other inhabited territories of the world by total population, based on estimates published by the United Nations in the 2024 revision of World Population Prospects.
Insect species (IUCN, 2016.1) 5993 extant species have been evaluated; 4291 of those are fully assessed [a] 3144 are not threatened at present [b] 1146 to 2848 are threatened [c] 59 to 105 are extinct or extinct in the wild: 58 extinct (EX) species [d] 1 extinct in the wild (EW) 46 possibly extinct [CR(PE)] 0 possibly extinct in the wild [CR(PEW)]
Nonetheless, an estimated 87.5% of the world's flowering plant species are animal-pollinated, [36] and 60% of crop plant species [37] use animal pollinators. This includes the majority of fruits, many vegetables, and also fodder. [38] According to the USDA 80% of insect crop pollination in the US is due to honey bees. [39]
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