Calliopsis are often specialists…the most common (C. andreniformis) loves things like hard packed playgrounds. You have it at your house almost for sure. Want more of them dig a whole or pile up dirt and they will move in for you to watch…along with their wee Holcopasites parasite.
A denizen of the southern Andes and widely believed to be in decline due to competition and perhaps spread of pathogens with two introduced European bumblebees that have invaded the region. You notice this bee when it flies by. Dramatically orange with yellow highlights on the traditional deep black integument of bumblebees.
This is Pseudoanthidium nanum a bee we first realized was present in the U.S. about 10 years ago. It now is established in the NJ and MD areas, and I believe I saw records from the Chicago area last year. I have only found it in the most urban of urban areas on the riot of weeds that we always bring with us where ever we live.
Tiny, it is like a colorful little flying pea. Note: weeds can have pretty flowers too….Photograph by Anders Croft.