A general insect survey was conducted, from 2000 to 2003, because of the growing realization among plant protection specialists in the UAE that our knowledge of the most basic aspects of insect biology and management was far below the level required for effective application to agricultural and health problems. The objectives of the survey was to discover and illustrate the diversity, composition, and geographical and ecological ranges of insect fauna of the UAE. Population density of insects present in different habitats of various areas of the country (Urban, agricultural, forest, and desert) was determined, using traps. Sticky traps, with different attractants, were placed in each habitat. The comparison of insect diversity and abundance between habitats provided an insight into long-term ecological trends affecting changes in the community structure of a given habitat. Most insect populations were important and vital parts of the natural communities found in each habitat. A few species posed a threat to agricultural and non-agricultural resources because, during outbreaks, they destructed economic plants directly or made them vulnerable to disease or further insect infestation. Several years of collecting was necessary to establish an accurate inventory of the insect groups found in this country.