It’s a bit old news, but I’ve only just found out about it. During wild bee research in New York State, one species was observed for the first time in over 100 years in the state. Congratulations to the rediscoverer!
Do you remember my previous post about oligolectic bees? Andrena rehni is a member of this group. It is common in plant-pollinator relationships that the specialisation is only on one side. This is also the case here. The American chestnut can be pollinated by other insects in the absence of its specialist. So, Andrena rehni can’t live without its favourite tree, but the tree didn’t miss the bee too much during its absence.











