Wednesday, 24 April 2013

April 21st - Magyar tavaszi-fésűsbagoly?

I think the moth in the pictures below is Dioszeghyana schmidtii (named after two Hungarian entomologists). This is a Hungarian Red Data Book species and listed on Annexes II & IV of the 1992 'European Habitats Directive', i.e. a species whose conservation requires the designation of special areas of conservation and a species in need of 'strict protection'. Recently it has been found to be more common than originally thought but it is still considered a rare species and, furthermore, one with a restricted distribution within the continent. Its world distribution centres on the Carpathian basin; it was long thought to be a Pannonian bioregion endemic. The range of the species has since been shown to extend south into northern Greece and Turkey (Korompai 2006 and see www.macrolepidoptera.hu).

Two were found amongst the 44 Orthosia cruda in a 40W actinic light trap run overnight on the 17th to 18th April in Miskoltapolca. On 20th April I ran the trap again, but placed it further into the bokkor-erdő. This time there were 10 (and only 9 O. cruda). They are quite distinctive moths although the size is similar to O. cruda. Korompai (2006) usefully summarises the distinctions in external morphology between these two species. I don't have access to the standard reference - Ronkay et al. 2001 - so don't know if this is mentioned, but I also noted that when viewed head-on, the palps of this moth are very noticeably longer than in typical Orthosia cruda.

According to Korompai (2006) "D.schmidtii is an indicator species of the xerothermic loess steppe-forests (Aceri tatarico - Quercetum), formed by Tataric steppe-maple and oaks. It occurs most frequently in this habitat, but it lives in addition also in other natural, well preserved, forest-steppe-oak forests of the plain, of hill-landscapes and foothills of mountains".

The south side of Kis Köves - a small hill on the edge of Miskolc and on the edge of the Bükk hills (but lying outside the national park boundary) does indeed seem like suitable habitat. It has small rocky, grassy patches surrounded by low Quercus pubescens woodland with Acer tartaricum, Prunus mahaleb, Euonymus verrucosus etc and does include a little Quercus cerris (one of the species which has been mentioned along with Q. pubescens and A. tartaricum as a possible food plant). I looked for the species amongst my Orthosia catches when I was in Miskolc in the second half of March last year but this was probably slightly too early in the season. 

40W actinic light 20/04/2013. Large well defined reniform and orbicular stigmata. 
40W actinic light 20/04/2013. Internally the stigmata are not darker than the forewing base colour. A  slightly wavy cross-line is the same colour as the edges of the stigmata.

40W actinic light 20/04/2013. In this photograph the asymmetrical pectination of the male antennae can be seen. According to Ronkay et al. (2001) this is a typical external characteristic of the species (see this thread on lepiforum.de).
40W actinic light 17/04/2013. Shot showing palps.
40W actinic light 17/04/2013. The ground colour appears a deeper, almost chocolate, brown in photographs taken early in the morning or in the evening. In afternoon light (first three photos) the moths have a much more ochraceous appearance.
40W actinic light 17/04/2013.



References

Korompai, T. (2006). A Ponto-Mediterranean speciality of Europe, the "Hungarian Quaker", Dioszeghyana schmidtii (Diószeghy, 1935) (formerly Orthosia schmidti) (Lepidoptera: Noctuidae). In: Rezbanyai-Reser, L., Kádár, M. and Schreiber, H. 3rd European Moth Nights, 27.4.-1.5.2006, a scientific evaluation (Lepidoptera:Macrolepidoptera).

Ronkay, L., Yela, J. L. & Hreblay, M. (2001). Hadeninae II. - Noctuidae Europaeae. Volume 5. Soro, Entomological Press.




Other species recorded at light in these two sessions were:


Anticlea badiata
Anticlea derivata
Conistra erythrocephala
Conistra rubiginea
Conistra vaccinii
Diurnea fagella
Drymonia ruficornis
Egira conspicillaris
Eriocrania sp.
Eupithecia abbreviata
Eupithecia dodoneata
Eupsilia transversa
Ligdia adustata
Lithophane ornitopus
Nola cicatricalis
Orthosia cerasi
Orthosia gothica
Orthosia incerta
Orthosia miniosa
Polyploca ridens
Semioscopis steinkellneriana


April 2013 - Sallowing/Fűzfavirágozni

I made several visits to the low Salix bushes in a wide open strip (maintained underneath electricity cables) in the forest near Miskolctapolca in mid April but only on three nights did I find any moths feeding on their flowers. Flowering started (anthers emerged) on about the 10th and by the 20th most catkins were looking spent and many plants were leafing. The best night was the 12th when the rain poured down and every bush was busy with noctuids. I couldn't reach many of the catkins in the best clump of bushes because they were so tangled up in very tall brambles. It was good to see the overwinterers, Conistra rubiginea, Conistra erythrocephala and Lithophane ornitopus feeding as well as the common Orthosia species, cruda, gothica and cerasi. The next night I was armed with secateurs and though the conditions were dry and much more pleasant for a human to be out in, there was no throng of moths, just a few Orthosia gothica,  Conistra vaccinii and a very nice couple of fresh Cerastis rubricosa. 

Változékony Őszibagoly           Conistra vaccinii           Chestnut
enjoying a meal at a female Sallow catkin after a long winter.
There are a good number of tall Salix caprea trees along the edges of the rides and firebreaks on the north sides of the hills near Miskolctapolca. These of course produce hundreds of times more catkins than the small bushes under the pylons. Unfortunately they are mostly too high to really look at well. One night I tried the technique recommended in old books of laying a sheet on the ground beneath the crown of a tree and giving the branches a sharp tap with a long stick. This didn't bring down a large number of moths but it did  produce two species not found on the low bushes in the open (where it is palpably much cooler half an hour after dusk): Conistra rubiginosa and Orthosia munda.  
Vörös Őszibagoly         Conistra rubiginea         Dotted Chestnut
freshly arrived at this male plant.
At the end of March someone had cut down one of these Sallows, a male, presumably to use or sell the catkins for Easter decorations. They had left some scraps behind on the floor so I took a few of the sticks home and put them in a bucket of water. These opened about the same time as the still growing plants but, although they attracted bees during the day didn't seem to be attractive to noctuids. On the 15th however I was pleased to find a Triphosa dubitata feeding on a catkin that was by then passed its best. We've encountered this a few times on our south facing slope where its food-plant, Rhamnus cathartica, grows. I suspect it might not often have the opportunity to feed on Salix nectar after its hibernation. 
Vörhenyes Tavaszibagoly          Cerastis rubricosa         Red Chestnut
This moth had evidently already been feeding at male Sallow bush this evening before it visited this female plant. There are grains of pollen on the moth's antenna, proboscis, face and on the fur of the underneath of its thorax.

The sudden change in conditions from snow and ice to temperatures in the mid 20s this spring has caused some early flowers to be over very quickly. My particular patch of Salix bushes are now finished as far as adult moths feeding goes. Another shrub native here which flowers early, before its leaves appear, and when there are few other nectar sources around, is Cornus mas (Cornelian Cherry or Húsos Som). Its flowers seem to be used by Lacewings (Neuroptera) after dusk but so far I have only witnessed one lepidopteran visitor to them - a Hypena rostralis.

These are the 12 species recorded feeding at Sallow 10th to 17th April 2013, Miskolctapolca:

Conistra rubiginea                     Dotted Chestnut           Vörös Őszibagoly
Conistra erythrocephala            Red-headed Chestnut   Vörösfejű Őszibagoly
Conistra vaccinii                       Chestnut                       Változékony Őszibagoly
Emmelina monodactyla Morning-glory Plume Moth       Közönséges Tollasmoly
Orthosia cruda                          Small Quaker               Kis Fésűsbagoly
Orthosia gothica                       Hebrew Character        Foltos Fésűsbagoly
Orthosia cerasi             Common Quaker          Közepes Tavaszi-fésűsbagoly
Cerastis rubricosa                     Red Chestnut                Vörhenyes Tavaszibagoly
Lithophane ornitopus                Grey Shoulder-knot      Közönséges Fabagoly
Conistra rubiginosa                   Black-spot Chestnut     Télibagolylepke
Orthosia munda                        Twin-spotted Quaker   Tölgyes-fésűsbagoly
Triphosa dubitata                      The Tissue                    Kutyabenge Araszoló


Compensations on the blank Sallow nights were a Brachionycha nubeculosa netted on the ride and an Agonopterix pallorella flitting about amongst dead Knapweed stems.

Friday, 8 March 2013

February 2013 - old chestnuts and a Madagascan comet

Tölgy Tavaszi-araszoló
Agriopis leucophaearia
Spring Usher

The first Tölgy Tavaszi-araszoló (Agriopis leucophaearia) of the year was seen on February 8th at Nagy Száraz Völgy near Tapolca but perhaps they were out before that - I noticed this only because it had settled by chance on a white painted waymarker in the forest (which had also been visited by a woodpecker!). Trunk searches since then have produced a steady stream of resting males (like many winter active geomterid moths, the females are flightless and have only vestigial wings) on oaks, hornbeams and limes usually about a metre above the ground (but that might be more to do with trunk-search ergonomics than the moth's real preference....). The British know this moth as the Spring Usher because of its late winter emergence time which seems to herald the change of the season. They stick around long enough to see the arrival of spring but by April they'll mostly be gone (having left eggs ready to hatch and feed on the oak leaves when they come).
 
Zöldes Tavaszi-araszoló
Phigalia pilosaria
Pale Brindled Beauty
In the middle of the month there were a couple of rather mild days when you could smell the stirrings of life in the soil (though the week after that Miskolc was thick under snow again, albeit briefly). On the 17th the dog picked up her first tick (Ixodidae) of 2013. For me this was a sign that Pale Brindled Beauty (Zöldes Tavaszi-araszoló, Phigalia pilosaria) might be out and I thought about dusting off the trap to see if we could catch one or two in the garden. But no need, having de-ticked the dog, we then saw one fluttering, ghost-like, low amongst the hornbeams, before dusk beneath the Várhegy. The temperature was only about 2°C but he knew it was time -for me a Pale Brindled Beauty is the real 'spring usher' although it has a similar flight period to A. leucophaearia. I had a half hearted attempt to find one of the flightless females he was searching for on the tree trunks but quickly gave up; I had no torch with me and am insensitive to Geometrid pheromones. I hope he had better luck.
Amata phegea larvae grazing on bryophytes at the base of a hornbeam
Another lepidopteran 'spring usher' for the Bükk must be these appealing little caterpillars which suddenly appear on tree bases round about the same time as A. leucophaearia adults start to become noticeable. I first saw one of these in the middle of the month while looking for the latter on tree trunks. I assumed it had just come out of hibernation and was about to walk off in search of food, or else crawl back under the bark, but subsequently these became a common sight, sometimes three, or four together and more often than not on tree bases. They are not bothered which tree - oak, maple, hornbeam, beech and lime are all used. The attraction is the epiphytic mosses on the foot of the tree (mostly Eurynchium praelongum and Hypnum cupressiforme I think) close observation showing that they feed on these bryophytes (although they are shy about it when approached) - not much fresh herbage on the forest floor yet. However, they are clearly very polyphagous; one was seen eating a dead mistletoe leaf, one on a blade of grass in the middle of a ride, two or three on overwintering Geum urbanum leaves and one even munching through the thin layer of bark which had been separated from a tree twig. These are the larvae of the Nine-spotted (Fehérpettyes Álcsüngőlepke, Amata phegea) which species' given foodplants are herbs such as Plantago, Rumex, Galium etc.

I tried the 40W actinic lamp on 26th and recorded about 60 moths of 7 species:

 Agriopis leucophaearia - Spring Usher - Tölgy Tavaszi-araszoló

Alsophila aescularia - March Moth - Vadgesztenye-araszoló

Theria rupicapraria - Tavaszi Kökényaraszoló

Agriopis marginaria - Dotted Border - Sárgás Tavaszi-araszoló

Apocheima hispidaria - Small Brindled Beauty - Borzas Tavaszi-araszoló

Triphosa dubitata - The Tissue - Kutyabenge Araszoló

Conistra vaccinii - Chestnut - Változékony őszibagoly
The last two species overwinter as adult moths. Only one Noctuid, I had hoped for an early Orthosia or two, but just a couple of tatty Chestnuts (interesting that the early ones to emerge from hibernation seem in worse condition than others - a trap a week later produced some rather smart looking individuals).
 
Unknown Sphingid and Madagascan Moon Moth
The most colourful by far of my February moths are these two specimens which were presented to my on my birthday and of which I am extremely proud. One is clearly a Madagascan Moon Moth or Comet Moth (on account of its trailing wing tails). This is rare in Borsod-Abaúj-Zemplén. The other, a member of the Sphingidae (and apparently the subfamily Macroglossinae) may be new to science. Big thanks to Anna and Karesz for helping push the month's species total into double figures!

Saturday, 8 December 2012

Nagy Hőscincér/Great Capricorn Beetle


Nagy Hőscincer  Cerambyx cerdo  Great Capricorn Beetle
Whilst splitting logs yesterday I noticed that a couple of them had some decayed material on the surface and beetle galleries under the bark. Then I looked back at the pile of split pieces on the ground and was surprised to see a very large and beautiful longhorn beetle next to them. The insect was 53mm long and each antenna was 43mm long. Cerambyx cerdo, The Great Capricorn Beetle or Nagy hőscincér - a female, males have even longer antennae. The temperature was below zero but the sun was shining and the beetle slowly became active and began to move about. This insect is one of the largest European beetles and endangered throughout its range. It is listed on annexes II and IV of the EU Habitats Directive. A wood feeding species, its presence is an indication of 'healthy forest habitat' with long term continuity of deadwood - hence its increasing scarcity. The eggs are laid in or on deadwood parts of living trees and the later larval stages bore into sound wood where they eventually pupate. After eclosion the adult beetles overwinter in the pupation cavity. Like the Black Woodpecker, this species is regarded as an 'ecosystem engineer' because, through its excavation of living wood, it facilitates a whole assemblage of other forest species which either feed or breed within living and decaying wood. 
7cm tall cavity inadvertently opened by axe split


part of the trunk with decaying sapwood
containing various beetle galleries - perhaps
where the insect first colonised the tree
split surface showing tunnel leading
to cavity in heart of trunk



detail of cavity

Working through the pieces of firewood I found the two sections of a log which when they came asunder had opened up a large cavity deep in the heartwood. Presumably this was a Great Capricorn Beetle pupal cavity. The firewood, from somewhere in the Bükk hills, was bought in August, but we do not know when it was felled, and it was split into quarter pieces shortly afterwards. The log was a sawn length of oak trunk with the bark on, 24cm long and probably about 25 to 30 cm diameter before it was split up. On one of the split faces there is a hole which presumably led to an exit or entrance at the exterior surface of the tree before it was split. This was oval in cross section and about 20mm x 11mm. The tunnel continues at a gradient of about 45 degrees (unclear if this was an incline or decline because I don't know which way up the log was originally) into the heart of the trunk and terminates in a 7cm long cavity. This is also roughly oval or flattened-cylindrical in cross section and c.30mm x 15mm. The mouth of the chamber is blocked with a dense pack of fibrous sawdust-like material and the walls of the cavity are clothed with partially detached fine wood fibres giving them a felted-like texture. The nearest exterior surface is 10 cm and the wood surrounding the cavity is completely sound and solid. In the sapwood there is a small column of decayed wood which also contains various beetle workings including the remains of a few small adult beetles which I think are Scolytids. However some of the sapwood borings are up to 7mm diameter and are perhaps the work of the earlier stages of Cerambyx larvae(?).

 
 
An amazing beetle, I feel sorry to have  destroyed its incredible winter fastness and disturbed its hibernation. Other than with an axe or chainsaw it is difficult to imagine such a fortress being broken into. A determined predator like Black Woodpecker might be capable but it would hardly be worth the effort for a single beetle. No doubt the larval stages, when they are living closer to the bark, are taken in large numbers by woodpeckers though. A female beetle lays up to 300 eggs of which just 2 must reach adulthood (a process which takes 3 or more years) for a stable population to be maintained. I am now attempting to overwinter the insect in an artificial shelter in a cold cellar where it will be safe and am grateful to Francesco Vitali of the world Cerambycoidea forum for his advice.
 
References 
Buse, J., Ranius, T. & Assmann, T. (2008) An endangered longhorn beetle associated with old oaks and its possible role as an ecosystem engineer. Conservation Biology 22, 329-37
EU Wildlife and Sustainable Farming project (2009) Great Capricorn beetle – Cerambyx cerdo factsheet
 
 

 

 

 

 

 

Sunday, 25 November 2012

Tollas Púposszövő/Plumed Prominent

Ptilophora plumigera - an alert male with wings and antennae unfolded as it musters energy to fly
These have been the stars of November. The first one, a male, appeared at a lit window on the evening of 23rd October and was met with some excitement. With these plumes it was immediately recognisable despite it being the first Plumed Prominent (Ptilophora plumigera) I had seen. It is a scarce moth in Britain, restricted to a few scattered populations in some southern woods with Field Maple, Acer campestre, according to Waring and Townsend's field guide (although interestingly they say larvae have occasionally been collected from Sycamore, Acer pseudoplatanus). My 40W actinic trap caught two (both males) on the night of the 26th and I was very pleased about that. This was just the vanguard though. Throughout the first half of November it became an increasingly regular 'kitchen window moth'. On the 14th November the outside porch light was accidentally left on in the early evening and at least 10 males alighted on the whitewashed walls in the space of just half an hour between 17:00 & 17:30. Overnight traps in sight of south-facing woodland with Acer campestre on the 12th and 18th November attracted 20 and 23 individuals respectively of which just over 10% were females. It was by far the most abundant species on both these nights. The females are said to arrive at light later in the night than the males. The antennae of the females are not plumed (see photos) and their forewings are somewhat duller and darker (although there is considerable variation in the ground colour of the males' wings from a pale yellow to a rich tobacco). Although this is not mentioned in my field guide the females, at least in the individuals I encountered, were slightly larger as well, not just in the abdomen but in having a larger wingspan.
 
They seem to be fading away now (along with their feathered friends, Tollascsápú Araszoló, Colotois pennaria, which have been regular at windows and numerous in light traps since late September and the last one of which I saw a week ago). This is only the third Notodontid I have recorded in Miskolc to date (whereas as at 25.11.2012 76 Noctuids and 68 Geometrids). The first was 'The Argentine' or Ezüstfoltos Púposszövő (Spatalia argentina), which vies with this one for impressiveness. When I can find out more about this I intend to add a blog post on it. The other was Drymonia ruficormis.


A female Ptilophora plumigera with filamentous antennae - one of three attracted to 40W actinic light during the night of 12th to 13th November 2012
 
the female is not 'tollas' and, in common with many nocturnal moth species, it flies to light less readily than the male.

 
One of at least 21 males which came to a 40W actinic lamp in the first two hours after dusk on 18th November 2012.

 



 

Thursday, 15 November 2012

Őszibaglyok és Borostyánvirágok - Autumn Noctuidae & Ivy blossom

Vörös Őszibagoly Conistra rubiginea Dotted Chestnut


I had heard before from lepidopterists about how great a time can be had recording moths at Ivy (Hedera helix) blossom but until now my efforts to find moths in this way had been pretty disappointing. Its advantage for the moth recorder is that it flowers late in the year when other possible nectar sources are becoming scarcer. It can therefore function as a relatively efficient natural attractant, focussing the feeding moths present in a habitat together into one place. In Britain, where ivy is a very common woodland plant, finding good stands of it in bloom can be less easy than you might expect - the plants need warmth and sun to produce much blossom. Edges of woods can be good but often the flowers are too high to inspect easily. And then you need the weather conditions to coincide - the evenings need to be warm and calm enough for moths to be actively feeding. Conditions in the British autumn and early winter are often not like that. Living in Scotland where Ivy doesn't even always flower didn't help but even when I have found suitable clumps in England usually it has been in the wrong place and the wrong time for me to observe many moths.


  Zöldes Csipkésbagoly               Phlogophora meticulosa            Angle Shades
 
This year was different because I was in Hungary and in a house which has a big, south-facing patch of ivy alongside it which was well into bloom by late September. In Britain Hedera helix is often in flower a month later and tends to be visited mainly by winter Geometrids and the over-wintering species of Noctuidae (Leverton 2001 Enjoying Moths Poyser). Thronged with Hymenoptera and Diptera by day there were also good numbers of Lepidoptera by night. In the period from 27th September to October 5th, when the evenings were generally warm, I made 53 records consisting of 20 species (about the same number of species as my 40W actinic light trap attracted at the end of September) although I am sure these numbers underplay the total amount of moth activity there was. After that, although there was still sufficient nectar to attract flies by day for another week or two, the nights became distinctly cooler and no more moths were to be found.





Gamma Bagoly      Autographa gamma       Silver Y
unlike the other Noctuids found feeding this moth (in common with others of its subfamily, the Plusiinae) feeds in a semi-hover in front of the flowers - its legs are used for support but the wings are not folded and seldom remain still for long.
Four families were represented but three of these, the Pterophoridae, Arctiidae and Geometridae, only by single individuals; most of the moths were Noctuids. There were 2 species of 'any month' moth (Phlogophora meticulosa and Emmelina monodactyla) plus a Buttoned Snout (Hypena rostralis), a species with a protracted flight period, and  four species of Noctuid which overwinter as adults. The rest were summer or autumn species and although not a huge diversity there was a good range of species some of which, at least for me, were rather choice.
 


Élénksárga Őszibagoly         Jodia croceago             Orange Upperwing
perhaps this moth was the best surprise, an overwintering species but one that my light trap failed to detect either in autumn or spring. It is a warmth loving species with a Holomediterranean distribution, (very rare in Britian or possibly extinct) in Hungary probably associated with the Quercus pubescens karst scrub-woodland habitat which occurs in a scatter of patches amongst more extensive cover of other woodland types, for example, in the Bükk hills. There is a fragment of such woodland on Kis Köves here in Miskolctapolca and it is pleasing to think that the moth may breed here.


Name Magyar1 English family flight period2
Agrochola circellaris Világosbarna Őszibagoly The Brick Noctuidae VIII-X
Agrochola laevis Könnyű Őszibagoly Noctuidae VIII-X
Allophyes oxyacanthae Galagonyabagoly Green-brindled Crescent  Noctuidae IX-XI
Autographa gamma Gamma Bagoly Silver Y Noctuidae V-X
Conistra rubiginea Vörös Őszibagoly Dotted Chestnut Noctuidae IX-V
Conistra vaccinii Változékony Őszibagoly Chestnut Noctuidae IX-V
Dryobotodes eremita Változékony Tölgybagoly Brindled Green Noctuidae IX-XI
Eilema sp. egy Zuzmószövőlepke a Footman Arctidae  
Emmelina monodactyla Közönséges Tollasmoly Morning-glory Plume Moth Pterophoridae I-XII
Eupsilia transversa Rozsdabarna Télibagoly Satellite Noctuidae IX-V
Hypena rostralis Közönségés Karcsúbagoly Buttoned Snout Noctuidae III-XI
Idaea degeneraria Barnasávos Apróaraszoló  Portland Ribbon wave Geometridae V, VIII-IX
Jodia croceago Élénksárga Őszibagoly Orange Upperwing Noctuidae IX-V
Lygephila craccae  Bükkönybagoly Scarce Blackneck Noctuidae VI-IX
Mythimna albipuncta Fehérpettyes Rétibagoly White-point Noctuidae V-IX
Mythimna l-album L-betűs Fűbagoly L-album Wainscot Noctuidae V-X
Noctua comes Kis Sárgafübagoly  Lesser Yellow Underwing Noctuidae VI-IX
Phlogophora meticulosa Zöldes Csipkésbagoly Angle Shades Noctuidae V-X
Xanthia gilvago Foltos Sárgabagoly Dusky-lemon Sallow  Noctuidae VIII-X
Xanthia icteritia Nyárfa-Őszibagoly Sallow Noctuidae VIII-X
   
1. following names given at www.macrolepidoptera.hu  
2. largely based on phenological information given at www.lepidoptera.pl    
A list of the 20 species of lepidoptera found naturally feeding at Hedera helix blossom in late September- Early October 2012, Miskolctapolca, Hungary



Bükkönybagoly            Lygephila craccae       Scarce Blackneck
 

Galagonyabagoly          Allophyes oxyacanthae           Green-brindled Crescent

L-betűs Fűbagoly         Mythimna l-album       L-album Wainscot