[Bristol-Birds] warbler hybrid?

At Clinch Mt Wildlife Area yesterday evening, I saw what I thought was a female Hooded Warbler, with the yellow face sharply outlined in black but noticed it had a very distinct white eye ring. The upperparts were gray, not olive, no black necklace. The bird was giving a chink call note. Could this have been a Canada/Hooded hybrid? I saw and heard several Canadas in the area too. 
Thanks for any thoughts on this.
Anita Huffman
Rugby, VA
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