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Bee-fly on path surface
Observed: 29th April 2011 By: grant burleigh
Added: 30th April 2011
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.