Spring has definitely arrived and with it some early season bees to our bee blocks. I caught up to this blue orchad bee, Osmia lignaria, as she brought in some late evening provisions to one of her cavities. You can see the mud she uses to cap off the nest in the hole above her.
I am a researcher at CU-Boulder leading a USDA funded project looking at native bee diversity in agricultural landscapes of eastern Colorado. Please enjoy your visit and contact me if you have any questions.