These bees swarmed yesterday and landed on the fence . They are a wild starin of the Italian honey bee.
"As honey bee colonies become strong in the late
spring or early summer, they sometimes send off swarms
with one queen and several thousand workers. When the
queen tires of flying she chooses a resting place and the
workers cluster around her. Thus, you may find a swarm on
a branch or some similar site on your property. The swarm
will remain clustered together until scout bees have
located a suitable site for permanent nesting. This
usually requires two days or less, after which time the
swarm will break cluster and leave. "