XF1 and Mud Dauber nest (hive?)
Despite the rather confusing forum nomenclature applied by DPReview, a local protocol -- usually, but not invariably, followed -- has developed that discussions of Fujifilm cameras with 2/3" sensors, such as the X10, X20, X-S1, and XF1, are conducted in the Fujifilm FinePix Talk forum, while the discussions in the Fujifilm X System / SLR Talk forum are reserved for the Fujifilm cameras that sport APS-C size sensors.
I think that you chose the correct forum when you posted your XF1 mud dauber photos here.
Interesting images. Did you have no worries of getting stung while you were shooting?