RULE: Bay-breasted-Warbler (Nonbreeding or Immature Plumage)

<Question>
Match
{Variable}
Direct Choice
{Variable}
Infered Choice

IF
Was the bird seen singing = {No} AND
What colour were the LEGS or FEET = {Gray, or blue-gray} OR {Black, purple, or dark} OR {Unknown} AND
Was the RUMP or LOWER BACK light = {No} OR {Unknown} AND
What colour PATTERN if any was on the BACK = {Streaked, mottled, spotted, or barred} OR {Unknown} AND
What colour was the THROAT = {White, or pale (grayish-white)} OR {Unknown} AND
<What SHAPE was the BILL> = {Straight and slender} OR {Unknown} AND
<What LENGTH was the BILL> = {Short} OR {Medium} OR {Unknown} AND
What colour were the CHEEKS = {Olive (yellowish-green)} OR {Green} OR {Gray, or blue-gray} OR {Unknown} AND
What colour was the TOP of HEAD = {Olive (yellowish-green)} OR {Green} OR {Gray, or blue-gray} OR {Unknown} AND
<How BIG was the bird> = {Smaller than a sparrow} OR {Sparrow-sized} AND
<What TYPE of bird was seen> = {Warbler-like} OR {Songbird}
THEN
Bay-breasted Warbler (Confidence: 7)