Overview

Distribution

occurs (regularly, as a native taxon) in multiple nations

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National Distribution

Canada

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

Type of Residency: Year-round

United States

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

Type of Residency: Year-round

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Global Range: (200,000 to >2,500,000 square km (about 80,000 to >1,000,000 square miles)) Currently considered to include only Nearctic populations with Palearctic populations now placed in Enallagma circulatum Selys, 1883 (Turgeon et al., 2005). As such, distributed much of northern U.S. from coast to coast and all of Canada.

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Molecular Biology and Genetics

Molecular Biology

Barcode data: Enallagma boreale

The following is a representative barcode sequence, the centroid of all available sequences for this species.


No available public DNA sequences.

Download FASTA File
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Statistics of barcoding coverage: Enallagma boreale

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 10
Specimens with Barcodes: 21
Species With Barcodes: 1
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Conservation

Conservation Status

National NatureServe Conservation Status

Canada

Rounded National Status Rank: N5 - Secure

United States

Rounded National Status Rank: N5 - Secure

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NatureServe Conservation Status

Rounded Global Status Rank: G5 - Secure

Reasons: Currently considered to include only Nearctic populations with Palearctic populations now placed in Enallagma circulatum Selys, 1883 (Turgeon et al., 2005). As such, distributed much of northern U.S. from coast to coast and all of Canada.

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Threats

Comments: Hecker et al. (2002) found that gregarine parasites (Apicomplexa: Eugregarinidae) effects on this species are subtle and likely masked by other factors, such as age of host and seasonal and environmental factors; which contradicts other studies of other species which imply more serious effects of gregarine parasites on damselflies.,

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Wikipedia

Boreal Bluet

The Boreal Bluet (Enallagma boreale) is a species of damselfly in the family Coenagrionidae.

Contents

Identification

Adult

The Boreal Bluet is a small damselfly with a length of 1 to 1.6 inches (26 to 40 mm) long. The male is predominately blue on the sides of its thorax, and the upper side of its abdomen. 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.

Nymph

The nymph of the Boreal Bluet is small in size with a length of 0.75 to 1 inch (19 to 23 mm). It has the typical slender shape of many immature damselflies. Nymphs range in color from light to dark brown.

Distribution

Habitat

The Boreal Bluet occurs along lakes, ponds, marshes, and streams with slow to moderate flow. This species occurs in a wide variety of habitats, from sagebrush desert to mountain lakes.

Flight season

Boreal Bluets can have a flight season of early June to late August. They also have a flight season from late March to late September.

Diet

Adult

The Boreal Bluet eats a wide variety of small soft-bodied flying insects, including mosquitoes, mayflies, flies and small moths. They will sometimes pick small insects such as aphids from plants.

Nymph

The nymph eats a wide variety of aquatic insects, such as mosquito larvae, mayfly larvae, and other aquatic fly larvae.

Ecology

The boreal bluet looks almost identical to the northern bluet. Even both of these species share similar ranges in North America, they are almost never found at the same body of water. Both the Boreal Bluet and the Northern Bluet are found early in the season. The reasons for this separation remains still unknown.

Reproduction

Male Boreal Bluets set up territories at their choice breeding sites. After both genders mate, the female Boreal Bluet oviposits in aquatic vegetation.

Similar species

Like many bluets in the genus Enallagma many species look similar to each other. The Boreal Bluet looks has similar to many bluet species. They include the Northern 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.

Subspecies

Enallagma boreale has two different subspecies. The following are the two subspecies:

Conservation

Boreal Bluet populations are currently widespread, abundant, and secure.

References

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Names and Taxonomy

Taxonomy

Comments: This genus is in need of thorough taxonomic and phylogenetic study; some of the subgroups may deserve taxonomic recognition (Westfall and May, 1996). Currently considered to include only Nearctic populations with Palearctic populations now placed in Enallagma circulatum Selys, 1883 (Turgeon et al., 2005).

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Disclaimer

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