Alison Olivieri correctly identified Quiz Bird #9 as a Golden-crowned Warbler.  Note the all gray back and tail, all yellow belly and chest and striping through the eye and crown.

(FYI: San Vito Bird Club member Cecilia Sansonetti just missed getting her bird feeder list submitted in time but she IDed 34 species on her feeder including a Snowy-bellied hummingbird she lured by putting FLOWERS on her feeder.)

(Golden-crowned Warbler photo courtesy of Yeimiri Badilla)