Wednesday, 27 December 2023

Wildlife Review 2023: Grasshoppers, allies & other invertebrates

Grasshoppers and crickets (Orthoptera

Bush-crickets nymphs started to appear in May with Great Green and Oak Bush-cricket on 1st. Quickly followed by Speckled on 3rd, a species that has become increasing common on site. One of the commonest, Dark Bush-cricket appeared from 7th.

Dark Bush-cricket - Alan Keatley
A rarely observed Roesel's Bush-cricket nymph was found on 9th May, evidence that this species is breeding on site, and with multiple sightings of adults in July and August is now established. 

Roesel's Bush-Cricket - Alan Keatley

Less positively for the second-year running no Common Groundhoppers were found, although Slender Groundhopper were regularly seen with the first of the year on 13th May. Predominately a coastal species, Grey Bush-cricket was noted from 20th with Long-winged Conehead appearing from 27th. 

Slender Groundhopper - Alan Keatley
Grasshoppers nymphs started to appear in June, with adults peaking in late summer and persisting into October. The first Field Grasshopper of the year was on 7th June and Common Green Grasshopper on 9th, joined by Meadow Grasshopper on 29th. 

Meadow Grasshopper - Alan Keatley

With numbers at their height, on 6th August several grasshopper species were active in the meadows including the year's first Mottled and Lesser Marsh Grasshopper.

Earwigs (Dermaptera)
Although present throughout the first Common Earwig of the year was not recorded on 5th May and can be encountered anywhere on site. The nationally scarce Lesne's Earwig is more selective in habitat choice. Active around the dunes, the year's first was found on 22nd July.

Lesne's Earwig - Alan Keatley
Cockroaches (Blattidae)

Three native species occur on site but only the one was found this year, Lesser Cockroach first noted on 6th June. The site holds good numbers of this nationally scarce coastal species.

Lesser Cockroach - Alan Keatley


Barkflies (Psocoptera)

Five widespread species were identified this year including Graphopsocus cruciatus on 20th February, Valenzuela burmeisteri on 13th August and Elipsocus hyalinus on 15th September. 

Mayflies (Baetidae)

The common species Pond Olive Cloeon dipterum was recorded from 3rd June.

Scorpion flies (Panorpidae)

Only one species identified this year but it was new for the Recording Area; Panorpa germanica on 28th April.

Panorpa germanica - Alan Keatley

Lacewings (Chrysopidae)

The only species positively identified this year was also new for the Recording Area, Chrysopa perla on 13th May.

Chrysopa perla - Alan Keatley

Caddisflies (Trichoptera)

New for the Recording Area was the large species Phryganea grandis to light on 11th June. The only other caddisfly found this year was Limnephilus affinis on 29th September.

Phryganea grandis - Kevin Rylands

Bristletails (Machilidae)

Commonly found near the seawall and Langstone Rock, the first Marine Bristletail Petrobius maritimus of the year was found on 7th May.

Marine Bristletail Petrobius maritimus - Alan Keatley

Silverfish (Lepismatidae)

Another new species for the Recording Area; a small outdoors colony of Silverfish Lepisma saccharina was found on 1st May.

Silverfish Lepisma saccharina - Kevin Rylands

Springtails (Collembola)

Inhabiting moist areas, such as leaf litter or under logs or stones, but also on walls and vegetation. They escape attention by using a jumping organ underneath their body. They are abundant with over 250 British species, but with most under 4-5mm their identification is challenging. The Recording Area currently has a modest list of 25 species, with 20 identified this year.

Many were identified in the early part of the year under damp conditions. In January eight species were recorded: Dicyrtomina ornata, Entomobrya intermedia, E. multifasciata, E. nivalis, Isotomurus palustris, Orchesella cincta and two new species: Sminthurus viridis and Vertagopus arboreus.

Sminthurus viridis - Alan Keatley

Four species in February included Orchesella villosa, the marine species Anurida maritimaLepidocyrtus cyaneus and Pogonognathellus longicornis.

Pogonognathellus longicornis - Alan Keatley

Another four were recorded in March; the globular springtail  Dicyrtomina saunderi, Entomobrya nicoleti, Neanura muscorum and Tomocerus vulgaris.

Dicyrtomina saundersi - Alan Keatley

April added another new species, Dicyrtomina violacea, Willowsia platani was found in May, and finally in August two further globular springtails; Dicyrtoma fusca and the last new species of the year - Heterosminthurus bilineatus.

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