Lasius platythorax

Almost identical to L. niger, but with different ecological requirements. This is one from a nest in a rotten log, which led me to suspect this species, confirmed later by looking at some specimens under a microscope.

Formica rufa

A worker of this wood ant species feeding on nectar in a celandine flower.

Formica picea

The black bog ant. A worker of this scarce species on heather at Cors Goch, one of it's two Welsh localities.

Formica lugubris

In Spring workers of this wood ant species mass on the surface of the nest on any sunny day.