Bluets
Family Coenagrionidae Kirby, 1890
- Genus Africallagma Kennedy, 1920 African Bluets
- Genus Azuragrion May, 2002 Sailing Buets
- Genus Proischnura Kennedy, 1920 Fork-tailed Bluets
Synopsis
- The common names of the three genera are:
- African Bluets
- Sailing Bluets
- Forktailed Bluets
- For ease of navigating the website will use the collective name Bluets in menus except where the species in individualy mentioned
Distribution
Worldwide
- Sailing bluets
- Six species are confined to Africa, Madagascar and Arabia
Africa
- African Bluets
- 12 species are endemic to Africa with one in Madagascar
- Sailing Bluets
- Five species are confined to Africa and Arabian Sea island of Socotra (near Yemen)
- Forktail Bluets
- Endemic to Africa
- Three species
- One endemic to South Africa (Proischnura polychromatica) (Mauve Bluet )
Habitat
- African Bluets
- Favouring stagnant and marshy, often temporary, conditions.. Most are found in open landscapes, often in highlands
- A. pseudelongatum is found in shady forest swamps, as is the rather black and greenish A. vaginale, also in lowlands.
- A. cuneistigma is restricted to stream pools at 1500-1600 m in the Chimanimani Mountains of eastern Zimbabwe.
- Sailing Bluets
- Inhabit open pools, perching just above the surface, often far from the waterside.
- A. nigridorsum and A. vansomereni can even perch on the water surface, sometimes drifting with the wind as if they are sailing.
- Forktailed Bluets
- Habitats typically have dense vegetation (grass, moss) and very shallow water.
- The best sites not only warm up quickly, but also have a slight current, e.g. boggy runnels or dense mats of floating vegetation along streams.
General identification features
- African Bluets
- Small (hindwing 13-22 mm) and slender
- Young Africallagma males are brownish, often with a pinkish hue. Thorax is often marked with black, but sometimes these markings are much reduced or faded to brown, appearing as ‘ghost’ stripes.
- It appears many species occur in both dark and pale forms, although in A. glaucum the dark form predominates, and in A. pallidulum and A. subtile the pale form
- Characters of markings should therefore be used with care and certain identification relies on the appendages.
- Sailing Bluets
- Very small (hindwing 11-15 mm) blue damselflies, with the exception of the medium sized (hindwing 20-22 mm) Socotran endemic A. granti.
- The postocular spots are typically narrow and connected, creating a characteristic blue line on the back of the head.
- Forktailed Bluets
-
- The three small (hindwing 12-18 mm) species superficially recall Ischnura but are less black overall, have long splayed cerci, and black pterostigmas with at most a narrow whitish rim.
- The tiny and dark purple P. polychromatica is currently known from only two areas in the Western Cape,
- P. rotundipennis is confined to South Africa’s highveld,
- The most numerous bluets found at marshy spots in most mountainous areas of tropical Africa are usually P. subfurcata. (Fork-tailed Bluet)
Synopsis
- Click on the images to link to the description page.
- Where possible images of males are shown To view females follow the link yo the description page.
Images
- African Bluets
Sailing Bluets
Forktailed Bluets
Credit
Adapted from Dijkstra & Clausnitzer 2014