| Home | Butterflies | Birds (media) | Flora and Fauna | My 5 Chickens | Daily | Spontaneous | About |
| Dragonflies | Other Photos | Observations | Species | Mexican birds | Checklists | TBP | Links |
Species account
Bog Hawker
(Aeshna subarctica)
Walker, 1908
Hawkers (Aeshnidae) [Dragonflies] BOHA 24802
Hawkers (Aeshnidae) [Dragonflies] BOHA 24802
Højmose-mosaikguldsmed (dk)
Gungflymosaikslända (se)
Synonyms (common):
Subarctic Hawker (gb) Subarctic Darner (us)
Synonyms (scientific):
Aeschna elisabethae Djakonov, 1922
Aeshna subarctica interlineta Ander, 1944
Aeshna subarctica interlineta Ander, 1944
Subspecies
elisabethae
Djakonov (1922) - Northern highland form with bluish-green panels on side of thorax with only a few small pale spots in between.
interlineata
Ander (1944) - Southern lowland form with yellow colored panels on the side of the thorax and with the spots in between often large or melted together to form a third panel. The form seen in Denmark and S Sweden.
Measurements:
To 70-76mm Ab 47-57mm Hw 39-48mm
Generations:
Flight period:
| J | F | M | A | M | J | J | A | S | O | N | D | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Scan | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| EU | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Identification:
Similar species:
Life stages:
Mating takes place in trees and bushes, and can last up to an hour. The lone female inserts the eggs into plant material (sphagnum), above or below the water surface, or even directly into mud or wet sand along the shore. The eggs overwinter and hatch the following spring. The larvae live in-between the sphagnum plants and develop during 2-5 years. The imago-transformation takes place in vegetation low and near the shore.
Distribution:
Northern Europe from Belgium to Poland and north. Rarer in Norway and northern part of the Scandinavian peninsula. Also the Alps and localized Romania and Bulgaria. Also Japan and temperate and arctic N America. In Denmark localized throughout Jylland and local i NE Sjælland.
Habitat:
Behavior:
Host plants:
Tørvemos (Sphagnum)
Endemic:
Redlist
(?):NE: Not evaluated
NA: Not applicable
DD: Data deficient
LC: Least concern
NT: Near threatened
VU: Vulnerable
EN: Endangered
CR: Critically endangered
EW: Extinct in the wild
EX: Extinct
RE: Regionally extinct
NA: Not applicable
DD: Data deficient
LC: Least concern
NT: Near threatened
VU: Vulnerable
EN: Endangered
CR: Critically endangered
EW: Extinct in the wild
EX: Extinct
RE: Regionally extinct
LC(global) NT(eu) NT(EU) NT(dk)
Status
In Denmark under pressure from habitat deterioration and only found at few suited locations. In Sweden and Finland more common and stable. But in general affected by climate changes.
Comment:
|
1094
(1 photos)
2022-08-20 Grib Skov (nordsjælland), Denmark Imago Male Sandskredssøen. It looks like I managed to photograph three different animals this day, of this new species for me. Unfortunately none of the photos are very good but at least sufficient to claim the species. Many of the necessary characters to see to identify it correctly are not visible on this photo, but at least the three minor spots on the side of the thorax, between the two yellow patches, is a strong indication of this species, over, especially, Moorland Hawker [Siv-mosaikguldsmed]. |
|
1095
(1 photos)
2022-08-20 Grib Skov (nordsjælland), Denmark Imago Male Sandskredssøen. Some might say that it is not possible to make an id from this poor photo, but still I decide to do so, arguing that the three small spots are better suited for this species than for Moorland Hawker. Also, it looks like the marking on S3 is broad toward the top, where Moorland shows narrow wedges only. |
|
1096
(2 photos)
2022-08-20 Grib Skov (nordsjælland), Denmark Imago Male Sandskredssøen. Thorax pattern supporting the species, of this number three animal today. It's a good example of the southern form of the Nordic animals which show the spots in between the large yellow ovals on the side of the thorax more like a third band. |
|
2288
(3 photos)
2023-08-27 Grib Skov (nordsjælland), Denmark Imago Male Sandskredsøen. One present today. An animal like this showing three well-defined spots between the two ovals on the side of the thorax ideally should be of the northern form of the species, elisabethae, whereas the form, interlineata, which is supposed to be the one seen in Denmark (according to Ole Fogh Nielsen - De Danske Guldsmede) shows these spots flowing together looking more like a third band. Billqvist (Nordens Trollsländor 2.edi) shows an animal presented as elisabethae that looks much like this animal, why I will have to conclude that either the two forms are both present in Denmark, or they are not as well-defined as these authors suggest. Perhaps you're speculating whether this animal could in fact be a juncea [Siv-Mosaikguldsmed] rather than a subarctica, based on the isolated thorax spots and what looks like a yellow spot on the back of the head. I did so myself, but I'm pretty sure that the amount of bluish-pale markings running up along the side where the abdomen is most narrow, S3, only can be seen on a subarctica. The overall dark presentation also supports this, plus the darker looking costa on the forewings. |
|
2362
(6 photos)
2023-09-16 Grib Skov (nordsjælland), Denmark Imago Male Sandskredsøen. Form elisabethae? A single present at the same spot at the NV-corner where I always have them. Different from 2288, but see that entry for more comments about subspecies affiliation. Distal part of the abdomen entangled in old web material. Apparently the birch tree perch is a favored spot for the species. Last year I was struggling to get decent photos of the species, only being able to see it in flight, when suddenly it came in and landed at the exact same spot on this tree. Unfortunately, at that moment, I was sitting on the opposite side of the tree and from there I could only see the tips of the wings sticking out, and well-knowing that I could impossibly move myself to the other side of the tree without the animal flying away, all I decided was to stay put and expressing a loud and clear ....! |
|
3043
(4 photos)
2024-08-31 Alvejen-skoven (Ryomgård), Denmark Map Imago Male Sø langs Grønholtvej(Margretheholmvej). Unsuccessfully looking for Moorland Hawker [Siv-mosaikguldsmed] this Bog Hawker showed up instead. Flying with several Migrant Hawkers [Efterårsmosaikguldsmed] it stood out as being darker and larger. It's a typical representative of the species here in Denmark, with the large middle spots on the side of the thorax. Maybe it is not enough, but to me it looks like the black horizontal face-line is narrower at the end. This is normally a detail attributed to Moorland, why it might not always be a safe character to judge from. The brown costae stand out, brighter than neutral, emphasized by the strong sunlight. Notice the slightly lifted abdomen in flight. Shot from out in the water, 4-5 meters from the bank, where it was patrolling steadily. Also present Brown Hawker [Brun Mosaikguldsmed], but no emperors. |