MNA Coach Trip Coombes Valley RSPB Reserve 17th May 2014

After circumnavigating the Staffordshire Market Town of Leek on a road diversion we eventually arrived at the RSPB Reserve at Coombes Valley. Coombes Valley was formed at the end of the last ice age, some 10,000yrs ago. A massive ice sheet covered the Cheshire Plain and as it retreated the trapped melt-water formed a huge lake which found an escape, carving the impressive V-shaped valley.

Coombes Valley is predominantly ancient broadleaved woodland dominated by Oak (Quercus sp.) with Birch (Betula sp.), Rowan Sorbus aucuparia, Holly Ilex aquifolium, Ash Fraxinus excelsior and Hazel Corylus avellana. Although much of the woodland was felled in the 1920s and 30s and charcoal production, used in the production of iron, occurred until the 1950s small areas of this ancient woodland remain. Currently the woodland areas are managed to provide a network of open rides and glades for the benefit of breeding Warblers and a UK Biodiversity Action Plan Priority species – the Argent & Sable Moth Rheumaptera hastata. Argent and sable are heraldic terms that mean ‘white and black.’ Two different races occur associated with different habitats. The smaller race nigrescens is a moorland species whose caterpillars feed on bog myrtle whereas for the slightly larger and darker race hastata which occurs in Coombes Valley sapling Birch (Betula spp.) up to a metre tall that are in full sun for most of the day appears to be essential.

The sunny conditions had brought out the Insects and Spiders – so the macro lens was quickly attached to the camera. A Nursery Web Spider Pisaura mirabilis was characteristically sun basking on vegetation with the first two pairs of legs together, stretched out at an angle – giving the impression on first glance that it only had six-legs. They usually stay motionless in this position until a fly or insect passes by, quickly sprinting to capture it. After mating the female produces a very large egg sac which she carries around in her fangs! When the time for the Spiderlings to hatch approaches, the female deposits the egg sac on a leaf and spins a protective silk ‘nursery web’ tent around.  She can often be seen standing guard on the tent until the Spiderlings eventually disperse.

MNA Coombes Valley Nursery Spider1

Nusery Web Spider

MNA Coombes Valley Snipe Fly1

Snipe Fly

Scrambling in the undergrowth I noted Scorpion Fly Panorpa communis, plenty of Snipe Flies Rhagio sp. Red and Black Froghopper Cercopis vulnerata, Green Tortoise Beetle Cassida viridis and a number of Cranefly species including Tipula luna and a pair of mating Tipula vitatta.

MNA Coombes Valley Mating Craneflies1

The leaves of Broad-leaved Dock Rumex obtusifolius had a number of Green Dock Beetles Gastrophysa viridula and the leaf undersides held groups of the oval yellow eggs.

The most numerous Hoverfly was Rhingia campestris – this distinctive species with a long snout, orange abdomen with a black line along the axis and along the lateral margins of the tergites was happily feeding on the masses of flowering Bugle Ajuga reptans and Lady’s Smock Cardamine pratensis. Other Hoverflies noted included Heliophilus pendulus and Eristalis abusivus.

MNA Coombes Valley Rhingia campestris1

Rhingia campestris

A couple of members had found a Leaf Beetle Chrysomelidae that I later identified as a Brown Willow Beetle Chrysolina staphylaea whose food plant is noted as Creeping Buttercup Ranunculus repens. Another interesting find was a male Slender Groundhopper Tetrix subulata –this small Grasshopper-like insect has wide ‘shoulders’ and a narrow tapering abdomen hidden beneath an extended pronotum.

MNA Coombes Valley Slender Groundhopper1

Slender Groundhopper

Most members had good views of one of the reserve’s specialities Pied Flycatcher with both male and female active around their nest-box close to the trail. A tree close held impressive tiers of the Fungi Dryad’s Saddle Polyporus squamosus. The Redstarts were slightly more skulking than the Pied Flys; although a number of males could be heard singing only a few members had brief glimpses. Willow Warblers, Chiffchaff and Blackcap were also in song. The woodland appeared ideal habitat for Wood Warbler – the young volunteer warden mentioned that they are in surrounding woodland but he hadn’t heard any singing in the reserve itself. A Nuthatch was seen entering its nest-hole and John Clegg observed a Great Spotted Woodpecker attempting to peck into one of the nest boxes.

MNA Coombes Valley Pink Purslane1

Pink Purslane

The botanists had a great day with a small group led by Pat Lockwood identifying over seventy species! Everyone was impressed by the abundance of flowers such as Germander Speedwell Veronica chamaedrys, Greater Stitchwort Stellaria holostea, English Bluebell Hyacinthoides non-scripta & hybrids, Herb Robert Geranium robertianum, Tormentil Potentilla erecta, Pink Purslane Claytonia sibirica, Red Campion Silene dioica, Bitter-vetch Lathyrus linifolius, Yellow Pimpernel Lysimachia nemorum etc. I particularly liked the slender, delicate drooping branches of Wood Horsetail Equisetum sylvaticum.

MNA Coombes Valley Yellow Pimpernel1

Yellow Pimpernel

MNA Coombes Valley Wood Horsetail1

Wood Horsetail

A good selection of Butterflies was noted including Green-veined White Pieris napi, Orange Tip Anthocharis cardamines, Small Copper Lycaena phlaeas, Peacock Inachis io and Speckled Wood Pararge aegeria. Walking back through the meadow area I was treated to a swarm of around twenty Longhorn Micro-moths Adela reaumurella dancing in the sunshine along the edge of a young Oak (Quercus sp.) hedge. A day-flying Moth – Small Yellow Underwing Panemeria tenebrata, was flitting around feeding on various plant species including Common Mouse-ear Cerastium holosteoides and Lady’s Smock Cardamine pratensis.

MNA Coombes Valley Small Yellow Underwing1

Small  Yellow Underwing

Love was in the air for a couple of Soldier Beetles Cantharis pellucida –they can more usually be seen feeding on both nectar and pollen from Hawthorn Crataegus monogyna and umbellifers.

MNA Coombes Valley Mating Soldier Beetles1

Cantharis pellucida

Back at the reception we caught up with other member’s sightings – Lynn and friend struck lucky with the Argent and Sable Moth on one of the woodland rides, they also noted Green Hairstreak Callophrys rubi and a stunning Two-banded Longhorn Beetle Rhagium bifasciatum.

As a finale there was not one but two Corpse Of The Day! A European Badger Meles meles skull – the jaw is normally permanently attached to the skull due to the “wrap-around” articulation and the presence of a sagittal crest that tends to overhang the back of the skull as it gets older.

MNA Coombes Valley Badger Skull1

Badger Skull

A Red Fox Vulpes vulpes skull – similar to a Dog but with flat or concave surfaces to the post-orbital processes.

MNA Coombes Valley Fox Skull1

Fox Skull

If you are interested in the wildlife of the north-west of England and would like to join the walks and coach trips run by the Merseyside Naturalists’ Association, see the main MNA website for details of our programme and how to join us.

A wide photographic selection of birds, marine life, insects, mammals, orchids & wildflowers, fungi, tribal people, travel, ethnography, fossils, hominids, rocks & minerals etc. is available on my Alamy webpage


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