Argiopes, Athletas & Adders By Chris Newman |
The muddy, grey, tumbled cliffs between Highcliffe and Barton-on-Sea, Hampshire may not look like ideal arachnid territory but they are home to one of the UK’s most attractive spiders – Argiope bruennichi. During the summer months the reed beds which fringe the small freshwater pools on the land-slipped plateaus of the cliff are festooned with the webs of this colourful and spectacular spider and as the summer draws to a close, the large egg-sac is frequently sighted.
Argiope bruennichi was first recorded in Britain at Rye (East Sussex) in 1922 and has since been sighted all along the south coast, from Kent through to Dorset. It now appears that the species could well be increasing its range, with sightings as far afield as East Cornwall, Derbyshire, Essex, Surrey and the Thames area. The species is widespread and common on the European mainland but it is considered scarce in the UK. Where it is found, however, it can be incredibly common. In some areas on the south coast it is certainly very abundant. The traditional habitat for this species is grassland, ideal for the placement of the large orb web and the reed beds are, thus, an excellent habitat. The large web is hard to miss but, although the spider is large and distinctive, it may be harder to spot, especially the much smaller male. As the summer months draw on increasing numbers of large egg-sacs can be sighted low in the reeds. The eggs over-winter in the cocoon, emerging the following spring. September and October are probably the best months to view the spiders and egg-sacs, provided the weather holds up.
The land-slips that make up the cliff-face can be quite dangerous, particularly after heavy rain when large areas become extremely boggy. Many a lost wellington boot can be sighted and great care should be taken. The habitat is also incredibly unstable, with large slips and falls common. In spite of this, this area is excellent for a huge range of wildlife, not only the spiders. The UK’s only venomous snake – the adder – is a common sight, as is the smooth newt. The large number of insect prey items, such as grasshoppers (the main prey of Argiope bruennichi) means the spider population can thrive here despite the rather adverse conditions.
The sedimentary material from which the cliff is comprised was laid down when the climate of Britain was quite different. In fact this area was a shallow, tropical sea which teemed with life. The area is known throughout the world for the diversity and quality of its fossil material, in particular the splendid gastropod shells. Shark’s teeth, turtle remains, crabs, bones and fossilised wood can also be found. The preservation is remarkable, especially as the material is some 45 million years old.
A vist to this area is strongly recommended, with spiders, sand and sea what more could you ask for? There is also plenty to interest the non-arachnophile members of the family, with abundant wildlife, fossils and a superb beach – altogether a good day out.