Giant Robber Flies

So I am walking around with my Nikon.  Looking and investigating to see what plants the honeybees might be foraging on.  I see this remarkable site and take a picture.  Later to see that these are Giant Robber Flies.  And yes, they do eat honeybees and other insects.   I can appreciate their natural beauty and place in nature but it is probably good for them that I didn't realize at the time what they were... LOL