Blue Orchard Bee      
 
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  Osmia lignaria
The blue orchard bee (a.k.a. orchard mason bee, Osmia lignaria)
is a solitary bee, native to North America.
 
 

 
  This bee is about 3/8 to 5/8 inch (9 to 16 mm) in length and is a dark metallic blue. Males are smaller than females, and have a tuft of white hairs on their face and have longer antennae.  
 
 
         
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