Bee-fly on path surface

Bee-fly on path surface

Observation - Bee-fly on path surface. Description: In each image of the fly that I obtained, the wings were rather blurred, suggesting that they were still vibrating. The weather felt colder than on previous days, consistent with the further possibility that the fly was obtaining heat from the path. This

In each image of the fly that I obtained, the wings were rather blurred, suggesting that they were still vibrating. The weather felt colder than on previous days, consistent with the further possibility that the fly was obtaining heat from the path. This in turn made me wonder how far bee-flies exhibit endothermy i.e. a capacity to warm themselves up from their own metabolism: they do have to undertake a lot of hovering rather early in the year.