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Palpopleura sexmaculata, [2] commonly known as the Asian widow or blue-tailed yellow skimmer, [3] [4] is a species of dragonfly in the family Libellulidae. It is widespread in several countries in South , East and Southeast Asia , but is no longer believed to occur in Sri Lanka .
Widow skimmers have large bulky bodies, with large heads. Adults have a steely blue body area but juveniles are yellow with brown stripes. [2] Eyes are also large and close together meeting in the middle of the head. [3] They have three pairs of legs. Legs are black in color. They have two pairs of wings: forewings and hindwings.
The black skimmer has an additional adaptation and is the only species of bird known to have slit-shaped pupils. [ 4 ] the forehead, ends of the secondaries, tail feathers and under parts are white, the rest of the plumage is black and the basal half of the bill is crimson. [ 5 ]
The chasers, darters, skimmers, and perchers and their relatives form the Libellulidae, the largest family of dragonflies. [2] It is sometimes considered to contain the Corduliidae as the subfamily Corduliinae and the Macromiidae as the subfamily Macromiinae. Even if these are excluded (as Silsby does), there remains a family of over 1000 species.
Libellula is a genus of dragonflies, called chasers (in English) or skimmers (in American), in the family Libellulidae. They are distributed throughout the temperate zone of the Northern Hemisphere. Many have showy wing patterns.
nymph in Cyprus Walking on water surface; the dark blobs are shadows cast by water disturbances around each of the six legs touching the water.. The Gerridae are a family of insects in the order Hemiptera, commonly known as water striders, water skeeters, water scooters, water bugs, pond skaters, water skippers, water gliders, water skimmers or puddle flies.
The Indian skimmer or Indian scissors-bill (Rynchops albicollis) is one of the three species that belong to the skimmer genus Rynchops in the family Laridae. They are somewhat tern-like but like other skimmers, have a short upper mandible and the longer lower mandible that is ploughed along the surface of water as the bird flies over the water to pick aquatic prey.
The black skimmer is the largest of the three skimmer species. It measures 40–50 cm (16–20 in) long with a 107–127 cm (42–50 in) wingspan. [ 5 ] This species ranges from 212 to 447 g (7.5 to 15.8 oz), with males averaging about 349 g (12.3 oz), as compared to the smaller females 254 g (9.0 oz). [ 6 ]