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Spiders of this family are orb web spinners

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Agalenatea redii
Very variable in its markings with distinctly different varieties. Those pictured show this variability. All were photgraphed on Cavenham Heath, Suffolk though I've found the species on a few other sites locally.
Araneus diadematus
A very common spider in gardens and open countryside. The colour of the abdomen may be brown, reddish or black. The cross marking may be reduced to a few white spots.
Close up of female showing epigyne
Araneus quadratus
This beautiful spider with the round abdomen can be found in open areas such as undisturbed grassland and heathland, where it builds its orb web close to the ground. It usually builds a more substantial retreat than that of A. diadematus
Green form Reddish version
Araneus marmoreus var marmoreus
The marmoreus form is generally less common than the pyramidatus one (see below), although I have found places where it is more common. It resembles Araneus quadratus but, whilst that can be dark along the side of the abdomen, it doesn't have the marbling.
Araneus marmoreus var pyramidatus
The more common colour form of A. marmoreus. The species can be found in a variety of open and semi-open habitats, such as bramble banks, nettle banks, woodland edges and hedgerows.
Araniella
There are a few bright green Araniella species. The most common is cucurbitina but identification requires specimens to be examined under the microscope.
Adult male Juvenile (with parasite)
Argiope bruennichi
Prior to 2016 I'd only seen Argiope abroad, but then in 2016 saw several at two sites in West Suffolk. The species is becoming increasingly common here. They seem to like areas of thick grass, with lots of grasshoppers for them to eat.
Cercidia prominens
Found low down in heather, thick grass etc. There are a few records from my area but it's not common.
Female Male Female in the web
Cyclosa conica
I have found several of this species, on isolated trees or woodland edges. However, I've never found more than one together.
Gibbaranea gibbosa
Seemingly widespread but not a species which I've found in large numbers, just occasional ones. In bushes or trees.
Hypsosinga pygmaea
Uncommon. Found on heathland.
Larinioides cornutus
Can be common in open areas, particularly wet habitats such as marshes, riverbanks. Colour varies slightly, some specimens being rather dark.
Larinioides sclopetarius
Similar to the above species, but is usually darker. It has different markings to N. umbratica. Usually found close to water, on bridges and other structures.
Adult male Adult female
Neoscona adianta
Common at a couple of sites locally, yet it seems to be absent from other sites which seem suitable for it.
Nuctenea umbratica
This is a very common species but is nocturnal and therefore few people are familiar with it. Its flattened body allows it to hide away during the day in cracks in walls, behind bark etc.
Zilla diodia
Both photos were taken on Cavenham Heath NNR, one at the base of a birch tree on the edge of the heath, the other in a bramble bush in woodland.
Zygiella x-notata
A very common spider, particularly around houses where it is the spider most likely to be found with a web in the corners of window frames. However, it will also build its web in bushes.
Zygiella atrica
Very similar to Z. x-notata, in size and markings, but the side of the abdomen is generally redder. Though common it is less familar than Z. x-notata because it is rarely found in gardens, preferring more open habitats.