Last few weeks at Arne

June is a glorious month!

Southern marsh orchids at RSPB Arne

It’s prime time for orchids and they seem to be everywhere I look now. We’ve got a lovely crop of southern marsh orchids on the reserve near the Shipstal ponds which are lovely to see there and very popular with the visitors.

A closer look look at a southern marsh orchid

I went to another of the RSPB’s reserves in Dorset for the first time a few weeks ago, with the estates team. Garston Wood is an area of ancient woodland near Shaftsbury, it’s famed amongst those in the know for spectacular displays of bluebells in the spring. When we went, they were all over but we did find some lovely early purple and common spotted orchids.

Common spotted orchid in Garston Woods

We were there to tidy up some logs left behind, following some clearance work to the rides through the wood. As part of the management of the wood, some areas have been cleared to allow more light in and provide more varied habitats for plants and other wildlife. Greatest biodiversity is often found on the edges, where one habitat merges with another so it’s important to manage the land in a way that will promote diversity.

During our work a very lucky palmate newt was spotted on one of the damp logs that had been piled onto the trailer. Very lucky to have avoided being squished!

Palmate newt at Garston Woods

As well as seeing other parts of the Dorset Reserves, I’ve also had plenty of opportunities to explore Arne and find out what each week brings. On an early morning walk, I spotted this labyrinth spider web. These are a kind of funnel-web spider but unlike their more famous Australian cousins, they are (mostly) harmless. The web was easy to spot in the morning dew but there are loads of them about now and easy to find if you are looking out for them!

There is someone at home!

Another seasonal sight on sunny days on the reserve are clouds of dancing male Nemophora degeerella. These are a longhorn moth whose caterpillars feed on leaf litter in deciduous woodland. They are beautiful moths with distinctive gold bands and striped patterns on their wings.

Nemophora degeerella in woodland at Arne

The moth traps have also yielded plenty more fascinating moths in the last few weeks. The contents of the traps have been becoming more numerous and varied with impressive hawkmoths being present most weeks too!

Treble Lines (Charanyca trigrammica) 

A fairly common moth with three distinctive lines across its wings. The photo shows two colour variants.

Oak Hook-tip (Watsonalla binaria)

Hook-tips are named as a group because of the curved tips of their fore-wings. The oak Hook-tip is fairly common in the south and found in oak woodland where the larva feed on oak leaves.

Peppered Moth (Biston betularia)

Probably known to a lot of those who studied GCSE biology as the classic example of the success of one genetic variant over another due to local environmental conditions. This black and white patterning is the typical form but an all black melanic form can also be found. In the big industrial cities of the north during the 19th and 20th centuries, the dark form became dominant. The simple explanation is that during the industrial revolution, the factories were pumping out huge amounts of smoke, leading to soot blackening of the tree trunks that the moths rest on. The dark forms were effectively camouflaged and avoided predation. The lighter speckled forms, while very well hidden on the light lichen covered trunks of unpolluted trees were very visible on the darkened trees. Since environmental standards have improved, the typical form is now dominant throughout the UK.

Small Square-spot (Diarsia rubi)

A pretty little moth. Common in the UK and particularly associated with damp marshy areas.

Fox Moth (Macrothylacia rubi) and eggs

This is a very tatty example of a fox moth. As they get older, their wings become more ragged. A freshly emerged moth has very bright clear markings on its wings and sharp crisp edges too.

Puss Moth (Cerura vinula)

Looking a (very little) bit like a fluffy white cat, the adult moth is very attractively patterned. It’s fairly common throughout the British Isles.

Iron Prominent (Notodonta dromedarius)

Presumably so-called because of the rusty red colouring on the patterned wings.

Eyed Hawk-Moth (Smerinthus ocellata)

Although I didn’t manage to get a picture, this moth has a dramatic blue and black eye pattern on its hindwings.

Poplar Hawk-moth (Laothoe populi)

Unusually, this moth rests with it’s hindwings forward of the forewings giving it a very distinctive shape. It is very well camouflaged on tree trunks as you can see in the photo!

Brown Silver-line (Petrophora chlorosata)

This is a common little moth which is often seen fluttering up  during the day if you walk through bracken.

Ichneumon Wasp

We also occasionally get other insect life in the moth traps. Cockchafers  are common as are the smelly Black Sexton beetle. This Ichneumon wasp was a bit more unusual. Ichneumon wasp are a group of long this wasps that tend to parasitise other insects, particularly butterfly and moth caterpillars. The eggs are laid in the host and when they hatch, the host provides the larvae with their first meal!

It’s been pretty challenging to fit everything I wanted to into this post, so I’m hoping from this week on, I will be able to stay up-to-date by writing a weekly post on what I’ve learnt and what’s going on at the reserve.

I’m planning to move things around on the blog a bit to give all this non-making stuff a place of it’s own and will try to get back to making things soon!


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