Two species of rare ground beetles (Bembidion schueppeli and B. litorale) are found in areas having partially vegetated sandy banks.

On higher parts of sandy banks are found Aegalia sabuleti, a small chafer and Diplocephalus protuberans, another money spider.

[2] Shingle fauna includes Bembidion monticola and B. stomoides, species of ground beetle; Fleutiauxellus maritimus, a small click beetle; Arctosa cinerea, a large wolf spider and Diplocephalus connatus, a money spider found in Britain only at this and one other north-east site.

It also supports a ground beetle, Pterostichus cristatus found only in Northumberland and Durham; and a number of rare spiders including Centromerus persimilis.

[2] The condition of Allen Confluence Gravels was judged to be favourable in 2010, although concern was expressed about the incidence of Himalayan balsam (Impatiens glandulifera).