Counting this weekend and today, 7 of the last 10 Nelson's Sparrow records are from Berrien (and an even higher percent if you add in the multi individuals from a couple of those).
We popped this bird up in the rightful location, Tiscornia.
When it flushed out of the grass my initial instant impression was that it was a Monarch Butterfly. The other spring Nelson's that I saw in flight before I saw it perched made me think female Baltimore Oriole. The moral is that if you see an orange sparrow, you should probably track it down. LeConte's is much paler (and will usually show a buffy rump especially if it's overcast). The napes on these spring Nelson's are a little greener than they are in fall when the dark gray really pops in flight.
It was the the dark gray crown stripe though through the view finder when it did perch that confirmed the ID: