Estimates of diversity indicate that nearly two-thirds of all described species of living organisms are insects, i.e. about 950,000 species. Together with insects, the other arthropods (spiders, mites, other arachnids, crustaceans, centipedes, millipedes, etc.) are the dominant life forms on Earth. In the Azores we counted 2,298 species and subspecies.
The 266 species of endemic arthropods currently known in the Azores is a poor estimate of the estimated real number, which could be around 400.
Containing the 2,298 Arthropoda species and subspecies hitherto recorded from Azores with 888 species illustrated, totalling 3,304 photos (Updated 22nd October 2010).