(Dorocordulia libera)
Conservation • Description • Habitat • Biology • Distribution • Taxonomy
Conservation Status |
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IUCN Red List | not listed |
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NatureServe | N5 - Secure SNR - Unranked |
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Minnesota | not listed |
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Description |
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Racket-tailed emerald is a fairly common, small, slender, 1⅛″ to 1⅝″ long emerald. The thorax is dark brown and metallic green with no vertical stripes on the sides. It is densely covered with brown hairs. The abdomen is long, slender, and black. There are no spots on the upper (dorsal) surface. The base of the abdominal segment 3 has a yellow ring around it that is uneven in width, wider at the base, forming a lower lateral basal spot. On the male, abdominal segments 7 through 9 are greatly expanded and somewhat flattened horizontally, forming a flat club. On the female, segments 7 through 9 are only slightly expanded. The wings are long, slender, and clear except for a black stigma at the leading edge of each wing and sometimes a small amber-tinted patch near the base. The forewing triangle does not have a cross vein. The eyes are bright green and are in contact at the top of the head. The face is metallic green. The legs are black. |
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Size |
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1⅛″ to 1⅝″ long |
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Similar Species |
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American emerald (Cordulia shurtleffii) is larger, up to 1⅞″ long. The ring around the base of abdominal segment 3 is narrow and even in width. The forewing triangle has a cross vein. | ||
Habitat |
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Small lakes, ponds, lake coves, and slow streams with boggy edges. |
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Biology |
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Season |
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Early June to mid-August |
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Behavior |
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Life Cycle |
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Naiad Food |
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Adult Food |
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Distribution |
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Sources |
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10/19/2012 | ||||
Occurrence |
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Fairly common |
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Taxonomy |
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Order |
Odonata (dragonflies and damselflies) | ||
Suborder |
Epiprocta | ||
Infraorder | Anisoptera (dragonflies) | ||
Superfamily |
Cavilabiata | ||
Family |
Corduliidae (emeralds) | ||
Subfamily |
Corduliinae | ||
Genus | Dorocordulia | ||
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Synonyms |
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Common Names |
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racket-tailed emerald |
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Glossary
Stigma
In plants, the portion of the female part of the flower that is receptive to pollen. In Odonata and Hymenoptera, a blood-filled blister or dark spot at the leading edge of each wing toward the tip, thought to dampen wing vibrations and signal mates. In Lepidoptera, an area of specialized scent scales on the forewing of some skippers, hairstreaks, and moths.
Visitor Videos |
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Other Videos |
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Racket-tailed Emerald Dragonfly (Corduliidae: Dorocordulia libera) on Grass Blade Carl Barrentine |
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About
Uploaded on Jul 2, 2011 Photographed at the Rydell NWR, Minnesota (29 June 2011). |
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