By Patsam
United Kingdom 
i have filled a hole on my lawn and now there are a dozen wasps by it why
16 Apr, 2011
Answers
It's been very dry--did you water the area? They could be after moisture.
16 Apr, 2011
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Could have been investigating it as a possible nest site. They have automatically logged on to the location......may have been some trapped inside.
16 Apr, 2011