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For 203 insect species that had IUCN-documented population trends in 2013, 33% were in decline with variation in documented species across orders. [13] Most scientific and public attention has been focused on the conservation of larger, charismatic vertebrates, and relatively fewer studies have been done on insect groups, especially Diptera ...
Insects with population trends documented by the International Union for Conservation of Nature, for orders Collembola, Hymenoptera, Lepidoptera, Odonata, and Orthoptera. A 2020 meta-analysis found that globally terrestrial insects appear to be declining in abundance at a rate of about 9% per decade, while the abundance of freshwater insects appears to be increasing by 11% per decade.
Lepidoptera are among the most successful groups of insects. They are found on all continents, except Antarctica . Lepidoptera inhabit all terrestrial habitats ranging from desert to rainforest, from lowland grasslands to montane plateaus but almost always associated with higher plants, especially angiosperms ( flowering plants ). [ 1 ]
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 .
While the northern parts of the Holarctic represent some of the largest areas of wilderness left on Earth, the southern parts are in some places extensively developed. This realm contains most of the world's developed countries, including the United States and the nations of Western Europe. Temperate forests were the primary ecosystem in many ...
Insects that survive subfreezing temperatures are generally classified as freeze-avoidant or freeze-tolerant. The general strategy adopted by insects differs between the Northern Hemisphere and the Southern Hemisphere. In temperate regions of the northern hemisphere where cold temperatures are expected seasonally and are usually for long ...
This is a list of countries and dependencies ranked by population density, sorted by inhabitants per square kilometre or square mile. The list includes sovereign states and self-governing dependent territories based upon the ISO standard ISO 3166-1. The list also includes unrecognized but de facto independent countries. The figures in the table ...
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]