Curious little guests sleeping over our door in Tallahassee Florida.

Came home to Tallahassee Florida last night to discover an odd little guest over our door, we took a quick shot of the fellow as we quietly walked into the front door. In the morning our guest was gone, but that very night our guest returned with a friend. Extremely tiny looking bird backsides, with mostly brown color to the feathers, we can't seem to identify what bird it is - and we don't want to disturb our, supposedly, nightly guests' sleep. Upon closer inspection the back feathers seem to have speckles of black and gray light fuzz... Which originally made us think it was a tiny chipmunk the night before until we noticed the 'tail' we saw really was feathers. Would really love to know what tiny birds these are.