[mou] Bird question at Fort Snelling State Park ?

[Terry99]

I am new to birding and saw some very blueish little birds on type of
the nesting boxs that are on poles in the marsh areas.  At first I
though they were bluebirds but when looking at the books it did not
seem to fit.  Then looking at several others sketches they did not
seem to be exact matches either.
Can anyone hazard a most probably guess and possibly you have seen them.



--
terry

terry99@gmail.com