On a prickly pear (Opuntia sp) flower
Carlsbad, CA
OLYMPUS DIGITAL CAMERA
P7190513b
Some nest entrances with full 90-degree turn turrets. Some plugged with pine resin which may indicate Osmia nemoris is using abandoned nests of D. diminuta. Penny for scale
requesting ID help on this bee
Feeding on Shortpod Mustard, with a nest site around the plant, https://www.inaturalist.org/observations/54670374.
Bee using low prickly-pear.
On globe mallow, smaller bee than the one I posted just before this.