TINY TUESDAY

Around here these tiny tiny bees are called "sweat bees" as they typically like to visit sweaty people....for the salt I'm guessing.
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Anyway, this little bee, most likely a female, is at best 3 mm long and is checking out the nectar availability on this small yellow flower.  Don't know what flower is; didn't have my Dichotomous Key with me.
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Didn't have the macro lens or extension tubes along either.....so I used the 150-600 Sigma.  Gotta make due with what you have, right?