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stillwaterll

swamp of these in backyard, what are they

10 years ago

Hi, we just saw a swamp of these flying around in our backyard and also crawling on the ground. We found they was a huge amount of them resting/coming out from some old tree trunks (tree cut down by previous owner several years ago). Not sure if they have a nest there or they are just resting there. What are they? How can we get rid of them? We used water to spray them, but not sure if there's a nest or something that needs to be taken care of.

The black one is the younger one I believe and the adult ones have wings.

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