Derby Fen

I was supposed to be 'in charge' at the Norfolk Moth Survey event at Derby Fen as none of the usual suspects could make it that night (9th June).  I'd not been there before so Dave and I arrived early and had a wander round. We managed to find a good range of moths in the lower parts of the fen including my first ever confirmed Marsh Pug, a Hawthorn Bent-wing Bucculatrix bechsteinella and a variety of the commoner Coleophora species.  We also found Little Grass-veneer Platytes cerussella to be abundant here, a species I’ve only previously seen in those sorts of numbers in the Brecks.

Marsh Pug, Derby Fen, 9th June

We were then joined by Tony and Garry and set up light traps. What may perhaps have been the best area to set them was too far to lug all the equipment, although Tony did manage to get his smaller trap down as far as a patch of Bog Myrtle. I was hoping we might find a Light Knot Grass there, but no such luck – but between us we did trap a nice variety of species including a few decent ones like Wood Carpet and Sloe Pug (both lifers for me).

Wood Carpet, Derby Fen, 9th June

Sloe Pug (male, gen det), Derby Fen, 9th June

We were surprised to find a Saltmarsh Plume Agdistis bennetii, but it seems like it was a good year for this species turning up inland.

Saltmasrh Plume Agdistis bennetii, Derby Fen, 9th June

Hawk-moths included Pine, Eyed, Poplar, Elephant and Small Elephant Hawk-moths and there were 3 Fox Moths. There were good numbers of July Belles and Sharp-angled Carpets along with 2 Shaded Pugs, 2 Four-dotted Footmen, a Broom Moth, 2 Bird’s Wings and a Dark Spectacle.

Fox Moth, Derby Fen, 9th June

Four-dotted Footman, Derby Fen, 9th June

Broom Moth, Derby Fen, 9th June

Bird's Wing, Derby Fen, 9th June

Other macro moth species we recorded were Ghost Moth, 4 Common Swifts, 2 Pebble Hook-tips, Treble Brown Spot, Dark-barred Twin-spot Carpet, 3 Silver-ground Carpets, Common Carpet, Yellow Shell, 2 Purple Bars, 3 Common Marbled Carpets, 5 Green Carpets, May Highflyer, Sandy Carpet, 's Pug, Wormwood Pug, 2 Common Pugs, 2 Grey Pugs, Small Yellow Wave, 2 Clouded Borders, Brown Silver-line, 5 Scorched Wings, 4 Brimstone Moths, 2 Peppered Moths, Willow Beauty, 3 Clouded Silvers, Light Emerald, Pebble Prominent, 2 Lesser Swallow Prominents, 2 Marbled Browns, 2 Pale Tussocks, 5 White Ermines, 2 Buff Ermines, 2 Cinnabars, Heart and Club, 6 Heart and Darts, 4 Flame Shoulders, Ingrailed Clay, 3 Setaceous Hebrew Characters, 4 Shears, 2 Light Brocades, 2 Bright-line Brown-eyes, Lychnis, Common Wainscot, 5 Shoulder-striped Wainscots, Grey or Dark Dagger, 6 Brown Rustics, Angle Shades, 3 Dark Arches, 2 Clouded-bordered Brindles, 2 Small Clouded Brindles, Large Nutmeg, 2 Rustic Shoulder-knots, 5 Marbled Minors, 2 Tawny Marbled Minors, 18 Middle-barred Minors, 6 Treble Lines, Mottled Rustic, Marbled White Spot, 4 Burnished Brasses, 2 Silver Ys, Dark Spectacle, Spectacle, Beautiful Hook-tip, 12 Straw Dots and Snout.

The rest of the micros were 3 Sorrel Bent-wings Opostega salaciella, Yellow-barred Long-horn Nemophora degeerella, Diamond-back Plutella xylostella, Gorse Case-bearer Coleophora albicosta, Hedge Case-bearer Coleophora striatipennella, Grey Rush Case-bearer Coleophora glaucicolella, Common Rush Case-bearer Coleophora alticolella, 3 Buff Rush Case-bearers Coleophora caespititiella, Large Groundling Teleiopsis diffinis, 2 Black-headed Conches Cochylis atricapitana, 2 Barred Fruit-tree Tortrixes Pandemis cerasana, Timothy Tortrix Aphelia paleana, Flax Tortrix Cnephasia asseclana, 9 Light Grey Tortrixes Cnephasia incertana, 6 Common Marbles Celypha lacunana, Plum Tortrix Hedya pruniana, 3 Triple-blotched Bells Notocelia trimaculana, Bright Bell Eucosma hohenwartiana, 4 Garden Grass-veneers Chrysoteuchia culmella, 2 Hook-streak Grass-veneers Crambus lathoniellus, 15 Meadow Greys Scoparia pyralella,

Caddisflies included Hydropsyche pellucidula and Limnephilus sparsus and there was a Glow-worm.

After all that lot it was a surprisingly quiet night back at home - which made me wonder how good Derby Fen would have been on a better night.  Single-dotted Wave and Snout were the only new moths for the year at home, the rest being Beech Midget Phyllonorycter maestingella, Cinerous Neb Bryotropha terrella, Barred Marble Celypha striana, 3 Common Marbles Celypha lacunana, Yellow-faced Bell Notocelia cynosbatella, 2 Garden Grass-veneers Chrysoteuchia culmella, Hook-streak Grass-veneer Crambus lathoniellus, Common Grey Scoparia ambigualis, Garden Pebble Evergestis forficalis, 2 Small Magpies Anania hortulata, Pebble Hook-tip, Cream Wave, Treble Brown Spot, 3 Silver-ground Carpets, Currant Pug, Pale Oak Beauty, Lesser Swallow Prominent, Buff-tip, Pale Tussock, 2 Orange Footmen, Common Footman, White Ermine, 4 Buff Ermines, Cinnabar, Flame Shoulder, 4 Ingrailed Clays, 3 Common Wainscots, Brown Rustic, Tawny Marbled Minor, Middle-barred Minor, 2 Mottled Rustics, 8 Straw Dots; also the caddisfly Limnephilus flavicornis.

Cinereous Neb Bryotropha terrella, North Elmham, 9th June

The following night was dire - just 19 species at what was coming up to the peak time of the year: Little Dwarf Elachista canapennella, White-shouldered House Moth Endrosis sarcitrella, London Dowd Blastobasis lacticolella, Narrow-winged Grey Eudonia angustea, Garden Pebble Evergestis forficalis, Small Magpie Anania hortulata, Treble Brown Spot, Clouded Border, Buff-tip, 2 White Ermines, 6 Buff Ermines, Heart and Dart, Flame Shoulder, Ingrailed Clay, 2 Common Wainscots, 2 Brown Rustics, Middle-barred Minor, Mottled Rustic and Burnished Brass.

There was a better range of moths during the day at the Cathedral Meadows next day, with Sorrel Bent-wing Opostega salaciella, Buff Long-horn Nematopogon metaxella, Cork Moth Nemapogon cloacella, Cherry-fruit Moth Argyresthia pruniella, Diamond-back Plutella xylostella, Cinerous Neb Bryotropha terrella, Common Yellow Conch Agapeta hamana, Yellow-spot Tortrix Pseudargyrotoza conwagana, 2 Light Grey Tortrixes Cnephasia incertana, 12 Common Marbles Celypha lacunana, Plum Tortrix Hedya pruniana, Yellow-faced Bell Notocelia cynosbatella, Hoary Bell Eucosma cana, 11 Hook-streak Grass-veneers Crambus lathoniellus, Common Grey Scoparia ambigualis, Yellow Shell, 4 Green Carpets and Straw Dot.

Buff Long-horn Nematopogon metaxella, North Elmham Cathedral Meadows, 11th June

Cherry-fruit Moth Argyresthia pruniella, North Elmham Cathedral Meadows, 11th June

Diamond-back Plutella xylostella, North Elmham Cathedral Meadows, 11th June

Light Grey Tortrix Cnephasia incertana (male, gen det), North Elmham Cathedral Meadows, 11th June

Common Marble Celypha lacunana, North Elmham Cathedral Meadows, 11th June

Bugs included 2 Leptopterna dolabrata and a female leafhopper would have been a new species for me if I'd managed to identify it to species-level - it was either Cicadula persimilis or Cicadula quadrinotata, but you need a male to get any further than that.

Leptopterna dolobrata, North Elmham Cathedral Meadows, 11th June

 Cicadula persimilis/quadrinotata, North Elmham Cathedral Meadows, 11th June

I netted a beetle seen flying over the railway and this proved to be Hydrobius fuscipes.  I think this is a very common species as I've found several since but this was the first one I'd identified.  There was also a 24-spot Ladybird and the hoverfly Eupeodes corollae.

Hydrobius fuscipes, North Elmham Cathedral Meadows, 11th June

Eupeodes corollae, North Elmham Cathedral Meadows, 11th June

I think this spider is Tetragnatha extensa, another I'd not identified before.

Tetragnatha extensa, North Elmham Cathedral Meadows, 11th June