The 18th individual species at my feeder this morning is this fellow; another "little brown bird," but what I think may be an immature White-throated Sparrow.
Hooray! The White-throats are here! Good job Mark.
It's not an immature. It's just a tan-striped instead of white-striped. Interestingly, white-striped will most of the time mate with tan-striped. A good percentage of the White-throated sparrows are tan-striped.