Riley Wilderness Park, Coto De Caza, Orange County, California, USA July 26, 2006
Am starting to see a lot of these, to the exclusion of other flies, i.e. robbers and bee. Newcomers are medium to almost large in size and appear very black when in flight. Flight is quick, low and for short distances.
Contributed by Ron Hemberger on 26 July, 2006 - 10:28pm Last updated 20 November, 2014 - 6:48pm
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