This is one of the tri-tone nomad bees, with black, yellow and red markings on the abdomen. Females are easier to identify than the other two similar species (Nomada panzeri and N. ruficornis) as it typically has a greater extent of pale yellow on the abdomen and the thorax lacks the dark red-striped scutum. It is quite large (10-14mm) and typically is seen investigating the nesting sites of its host, Andrena clarkella. It is likely to be the earliest nomad bee to emerge each year.

Distribution in Ireland: Widespread and locally common. Records span the island but are concentrated in Munster and Leinster.

Flight Period: Mid March- early June, usually peaking in April. It is unusual to see if after early May.

Habitat: Found in open woodlands, parks, landward edges of coastal dunes and brownfield sites reflecting the preferences of its host.

Flowers Visited: Primarily willow catkins, but sometimes other spring flowers such as Primrose or dandelions.

Personal Records: I have observed this species at several brownfield sites around the Hillsborough area (Co. Down), at Milford Cutting, Seagahan Dam, the Argory and Armagh City (Co. Armagh) and larger numbers feeding on dandelions in Lagan Meadows (Co. Antrim) and Knocksink Wood, (Co. Wicklow). I have also observed solitary females in Bonny Glen (Co. Donegal) and Drumkeeragh Forest (Co. Down). Females can be found flying around nesting sites of the host A. clarkella and also on willow catkins and dandelions nearby. Males can be found feeding on these flowers also, as well as basking close to the nesting sites. At Knocksink Wood, this species also appears to use Andrena apicata as a host in addition to A. clarkella.