You should totally go visit Garden Walk, Garden Talk today! The amazingly keen author of that blog has posted a story about an encounter between two bees and it is funny and entertaining (and full of beautiful photos, as always).
The two bees she observes interacting are the introduced European Wool Carder Bee (Anthidium manicatum), which is so named because it collects fuzz from plants to weave a wool-like cocoon for its offspring. It was accidentally introduced to the US…found in New York in 1963, by 2007 it had already reached California:
And the humble Carpenter bee (Xylcopa virginica):
I have been watching the Wool Carder bees dive bomb other bees (and actually knock them out of the air) all summer, so I am super delighted that Donna caught the whole adventure on film. I highly recommend that you go visit her blog to read the story (and maybe poke around in the archives as well!).