On knapweed in the garden
Orange stripe on leg may be characteristic!
No interactions present.
What this shows very well is the pollen-collecting apparatus - the patch of specialised orange (in this species) hairs under the abdomen of the Megachilinae. Most solitary bees carry pollen on the legs, but this subfamily is an exception.
recording wildlife with The Recorder's Year on www.hbrg.org.uk/TRY.html.
Lat/Lng: 52.1, -3.4
OS grid ref: SO0451