Species Diversity - an overview | ScienceDirect Topics It is also estimated that there are 15,000–20,000 species of butterflies in the world Therefore, if the ratio found in Britain of butterfly species to all other insect species is the same for the whole world, this would indicate that there are 4 9–6 6 million species of insects on Earth
Species count put at 8. 7 million - BBC News The world contains about 8 7 million species, according to the latest estimate - and it could take more than 1,000 years to identify them all 90% of what you get can be undiscovered species
Success – ENT 425 – General Entomology Reasons for Success It is certainly no accident that insects are the most abundant and most diverse group of organisms on earth They have maintained a position of ecological pre-eminence for over 400 million years: they have witnessed the rise and fall of dinosaurs; they have survived at least four major cataclysms that resulted in planet-wide extinctions; and they continue to thrive
UN Report: Nature’s Dangerous Decline ‘Unprecedented . . . 25%: average proportion of species threatened with extinction across terrestrial, freshwater and marine vertebrate, invertebrate and plant groups that have been studied in sufficient detail
Endangered Species Conservation - NOAA Fisheries Once NOAA Fisheries determines that a species warrants listing, it adds the species to its lists at 50 CFR 223 102 (threatened species) and 50 CFR 224 101 (endangered species) All plant and animal species, except pest insects, are eligible for listing Learn more about species listing under the ESA