Mud Dauber Wasp - Sceliphron caementarium
Also known as black and yellow mud dauber
Order Hymenoptera -- abelha, formiga, vespa
Suborder Apocrita -- abeilles, ants, bees, fourmis, guêpes véritables, narrow-waisted hymenopterans, true wasps
Superfamily Sphecoidea -- sphecoid wasps
Family Sphecidae -- cicadakillers, mud daubers, sand wasps, sphecid wasps
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Black and Yellow Mud Dauber

Live adult mud daubers photographed at Winfield IL during June - mid September. These wasps are extremely active and rarely stay in one place for more than a few seconds. I've never been lucky enough to find one gathering mud for its nest, neither have I ever seen a nest. I most frequently come across them hunting for prey amongst low vegetation, although I've never seen one catch anything, darn it. The terrible drought in the summer of 2005 in northern Illinois seemed to be good for these lovely creatures- I saw dozens of them, whereas they are usually quite rare.
             
 
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