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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.
The wings have a network of veins; between the veins the wings are generally transparent, but may be partly colored. [1] In most Odonata there is a structure on the leading edge near the tip of the wing called the pterostigma. This is a thickened, hemolymph–filled and often colorful area bounded by veins.
The pterostigma, a heavier section of the wing than nearby sections, assists in gliding. Without the pterostigmata, self-exciting vibrations known as flutter would set in on the wing above a certain critical speed, making gliding impossible. Tests show that with the pterostigmata, the critical gliding speed is increased 10–25% on one species ...
Rhyothemis fuliginosa is a short and stout dragonfly with a body length of 32-41 millimeters in length. The wings are 30–40 mm across and patterned with a deep blue iridescent shade. [11] [3] Depending on the viewing angle, the dragonfly's wings can vary in color due to their light scattering properties, with some appearing golden in the light.
Rhyothemis triangularis [2] (sapphire flutterer, lesser blue wing) [3] is a species of dragonfly in the family Libellulidae. It is widespread in eastern and southern Asia . [ 4 ] [ 5 ]
The eastern amberwing (Perithemis tenera) is a species of dragonfly in the family Libellulidae. It is very small, reaching a total length of no more than 25 millimetres (0.98 in). The males have orange or amber wings. Both sexes have a red pterostigma. [5] The eastern amberwing dragonfly is one of the only types of dragonfly that actively ...
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.
This is a small dragonfly, with a length of 30 to 35 mm (1.2 to 1.4 in). The wings are mostly clear but have a small patch of yellowish to orange clouding at the base of each hindwing. Mature males are brownish black on the face and thorax and have a red abdomen, while immature males have a yellow thorax and a yellowish brown abdomen.