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Dragonfly vision is thought to be like slow motion for humans. Dragonflies see faster than humans do; they see around 200 images per second. [80] A dragonfly can see in 360 degrees, and nearly 80 per cent of the insect's brain is dedicated to its sight. [81]
The shadow darner is a large dragonfly with a length of 68 to 78 mm (2.7 to 3.1 in). The base is brownish black in color. Greenish crescent-shaped spots are found at the top of the thorax. The sides of the thorax are marked with two yellowish to yellowish-green diagonal stripes. Its abdomen is marked with bluish green spots.
The green darner is a large dragonfly; males grow to 76 mm (3.0 in) in length with a wingspan up to 80 mm (3.1 in). [9] [10] Females oviposit in aquatic vegetation, eggs laid beneath the water surface. Nymphs (naiads) are aquatic carnivores, feeding on insects, tadpoles, and small fish.
The common whitetail or long-tailed skimmer (Plathemis lydia) is a common dragonfly across much of North America, with a striking and unusual appearance.The male's chunky white body (about 5 cm or 2 inches long), combined with the brownish-black bands on its otherwise translucent wings, give it a checkered look.
The emperor dragonfly [2] or blue emperor [1] (Anax imperator) is a large species of hawker dragonfly of the family Aeshnidae. It is the largest dragonfly in most of Europe, including the United Kingdom, [ 2 ] although exceeded in some areas by other species.
Aeshna canadensis, the Canada darner, is a species of dragonfly in the family Aeshnidae. It is common throughout southern Canada and the northern United States. It is common throughout southern Canada and the northern United States.
Diplacodes trivialis [3] is a species of dragonfly in the family Libellulidae [4] known as the chalky percher [5] or ground skimmer. [ 6 ] [ 7 ] It is found in Seychelles , Oman , United Arab Emirates , China , Japan , India , Maldives and southwards to New Guinea and Australia .
Rhyothemis variegata, [2] known as the common picture wing [3] [4] or variegated flutterer, is a species of dragonfly of the family Libellulidae, found in South Asia, [1] [5] Indochina and southern China.