| Northern bluet | |
|---|---|
 | |
| Male | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Odonata |
| Suborder: | Zygoptera |
| Family: | Coenagrionidae |
| Genus: | Enallagma |
| Species: | E. annexum |
| Binomial name | |
| Enallagma annexum (Hagen, 1861) | |
Enallagma annexum, the northern bluet, is a species of damselfly in the family Coenagrionidae. Enallagma annexum was formerly included with Enallagma cyathigerum .
The northern bluet is a small damselfly with a length of 1 to 1.6 inches (26 to 40 mm) long. The male is predominantly blue on the sides of its thorax, and the upper side of its abdomen. [2] Its lower abdominal appendages are longer than its upper appendages. The female's body is greenish-yellow to brown color. The upper side of its abdomen is mostly black. [3]
Northern bluets have a flight season of early May to July. [2]
Many species in the genus Enallagma look similar to each other. The northern bluet looks similar to many bluet species. [2] They include the boreal bluet, familiar bluet, Hagen's bluet, marsh bluet, and vernal bluet. It can be distinguished from familiar bluet by the large postocular spots and the shorter cerci. The characteristics shared by northern and boreal bluets are their large eyespots, and a mushroom-shaped black spot on abdominal segment S2. Its best seen dorsally.
Enallagma cyathigerum is a species found mainly between latitudes 40°N and 72°N; It is widely distributed in the Palearctic, and the Nearctic species Enallagma annexum was at one time considered to be synonymous with it. The species can reach a length of 32 to 35 mm. It is common in many different countries including Russia, Europe and South Korea. Damselflies are an important link between the health of the aquatic ecosystem and its response to climate change.
The Large red damselfly, Pyrrhosoma nymphula, is a species of damselflies belonging to the family Coenagrionidae.
The Irish damselfly or crescent bluet is a damselfly found in northern Europe and Asia to north-eastern China;. It is common and widespread in northern Finland, scarce and local in the Netherlands and Ireland and rare elsewhere. One of its English name comes from the fact that it is found in Ireland but not in Britain. The alternative name, crescent bluet, refers to the shape of the markings on segment two of the male and its scientific name.
Norfolk damselfly or dark bluet is a species of blue damselfly of the family Coenagrionidae. This species acquired its common name from its discovery in 1903 and presence in a very restricted area of the Norfolk Broads. Records came from Sutton, Stalham, and Hickling Broads.
Enallagma is a genus of damselflies in the family Coenagrionidae commonly known as bluets. The genus consists of the following species:
Acisoma panorpoides, the Asian pintail, trumpet tail, or grizzled pintail, is a species of dragonfly in the family Libellulidae.
The double-striped bluet is a species of damselfly in the family Coenagrionidae. This species grows to lengths 21–28 mm. Its common name from the peculiar black shoulder stripe, which is divided in two by a thin blue stripe. This is the key identification characteristic; no other damselfly has a shoulder stripe that looks like this one.
The stream bluet is a species of American bluet damselflies in the family Coenagrionidae. Its length is 29–37 mm. Many bluet species prefer ponds and lakes; the stream bluet as its name implies is most at home along moving waters. It can be found along small to medium-sized rivers. It is occasionally found at lakes too. In many species of damselflies the males have a blue tip to the abdomen. Enallagma exsulans is one of those less common cases where the female, too, has a blue abdominal tip. Summertime is the best time to look for stream bluets.
The tule bluet is a species of damselfly in the family Coenagrionidae found in North America.
The marsh bluet is a damselfly species in the family Coenagrionidae.
The orange bluet is a species of damselfly in the family Coenagrionidae.
The boreal bluet is a species of damselfly in the family Coenagrionidae.
Enallagma traviatum is a species of small damselfly in the family Coenagrionidae. It is commonly known as the slender bluet. The slender is small about 29–32 mm in length.
Enallagma pictum, the scarlet bluet, is a species of damselfly in the family Coenagrionidae. They are found from New Brunswick, Canada to Maryland.
Lestes elatus is a species of damselfly in the family Lestidae, the spreadwings. It is known commonly as the emerald spreadwing. It is native to India, Thailand and Sri Lanka.
Anax indicus is a species of dragonfly in the family Aeshnidae. It is found in India, Nepal, Pakistan, Sri Lanka, and Thailand.
Lamelligomphus nilgiriensis is a species of dragonfly in the family Gomphidae. It is endemic to the hill streams of Western Ghats of India. This species has been placed by many authors in Onychogomphus but should be included in Lamelligomphus following Fraser (1934), based on the shape of the male anal appendages.
Lestes dorothea or Forest Spreadwing is a damselfly species in the family Lestidae. It is distributed from south and northeast India to Thailand and Malaysia.
Platylestes platystylus or Green-eyed Spreadwing is a damselfly species in the family Lestidae. Although this species appears to be widespread, there are very few recent records. This species is known from old records from West Bengal in India, Myanmar, Thailand and Laos. There are recent records from Thailand, Vietnam, Laos and Kerala, South India.
Coenagrion ornatum, or, the ornate bluet, is a species of damselfly from the family Coenagrionidae distributed across a large part of Europe and Western Asia.
