Psychotic disorders are severe mental disorders that cause abnormal thinking and perceptions. People with psychoses lose touch with reality. Two of the main symptoms are delusions and hallucinations.
How many dragonfly species are there? Answer: The actual number of described species of Suborder Anisoptera (dragonflies) at this time is 2,874. The Suborder Zygoptera (damselflies) consists of about 2,698 species, and the Suborder Anisozygoptera contains only 2 species. Thus, there are 5,574 recognized species of odonates at the present time.
Four wings are better. The dragonfly is the aerial stunt of the insect world. Dragonflies were amongst the first insects to fly, about 300 Ma ago. 290 Ma ago, the dragonflies had a wingspan of 68 cm (2.3 ft).