Western mason bee

Description

Osmia uncinata is a wasp like mason bee with a yellow and black striped thorax which is quite variable in its colour and the degree of hairiness shown.They measure between 7mm and 15mm in length.In Great Britain Osmia uncinata is closely associated with relicts of the ancient Caledonian Forest,being found in woodland clearings,along paths through woodland,and on adjacent roadside verges where the principal forage plant,birds-foot trefoil Lotus corniculatus,is well established.