The nursery-web spider Pisaura mirabilis is the only member of the Pisaura genus in Britain. The abdomen is slender and tapering and there is a light stripe along the middle of the carapace. The colour is variable, and may be grey, yellowish-orange or dark brown. Although males are generally similar in appearance to females, they tend to be darker, with more noticeable markings and have smaller abdomens.
Size - Male length: 10-13 mm; Female length: 12-15 mm.