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 Postdoctoral Associate at CU-Boulder and have lead a number of projects studying patterns of native bee diversity in Colorado. Please enjoy your visit and contact me if you have any questions.