Length 2.5 to 4 mm.  The adults often have a broad or squat outline and they have long erect hairs covering the pronotum and forewings.   

Other Nysius lack the long hairs

Long erect hairs on pronotum and forewings

We recommend that a specimen is examined and photographed.  The diagnostic long erect hairs can be difficult to see in a field photograph.

Bare ground, dry grassland, arable land.  The species has a wide host range, including cultivated crops such as wheat, oats, barley and brassicas, plus various grass and clover species. In its native New Zealand it is considered to be a pest species of wheat and mustard crops in hot summers.

All year

Native to New Zealand, but a recent arrival in Britain from Europe.  It has spread rapidly in the UK since 2010.

Occasionally recorded

https://www.britishbugs.org.uk/heteroptera/Lygaeidae/Nysius_huttoni.html