From G.B.  “I was splitting wood and discovered leaf like cocoons.  They are about 1 inch long.  Not quite the same size as the purchased leaf cutter bee cocoons.  Would you please let me know what these are?  Photos attached….  ”  These are leafcutter bees.  The native leafcutter bees are often a bit larger than the commercial species.  The picture of the wooden cavity is an awesome picture.  I wonder what insect burrowed into the wood originally?  Likely a beetle species.

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