Yes Scaley breasted Munia aka Nutmeg Manakin. They are not native to Florida and are an established exotic(as many other species in Florida). Yes they usually do travel in small flocks, but not always.
Finally... I can sleep tonight!
Incubation for Canada Geese is 24-29 days... so probably very late Feb laying, which down in Arkansas is probably right especially if weather was mild(maybe just a tad early).