Few the past few days this bird has been living at our hummingbird feeder, sipping nectar and enjoying him/herself. Note a slender light beak, grey wings with no bars or stripes, yellow to white underside, no easily noticed eye bar or ring.
Candidates: Blue-winged Warbler dark legs, wingbars, eye line (not matching our bird) Northern Oriole aka Baltimore (Female) no white underside as seen on our bird, Summer Tanager (female) too heavy beak and markings off, your guess ???