RULE: Northern Beardless Tyrannulet

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

IF
What colour TAIL PATTERN was there if any = {None} OR {Unknown} AND
What colour was the BACK = {Olive (yellowish-green)} OR {Green} OR {Gray, or blue-gray} OR {Black, purple, or dark} OR {Unknown} AND
What colour was the BELLY = {White, or pale (grayish-white)} OR {Yellow} OR {Olive (yellowish-green)} OR {Unknown} AND
What colour PATTERN if any was shown on the BREAST = {Uniform color} OR {Unknown} AND
What colour was the BREAST = {White, or pale (grayish-white)} OR {Olive (yellowish-green)} OR {Gray, or blue-gray} OR {Unknown} AND
What colour was the THROAT = {White, or pale (grayish-white)} OR {Olive (yellowish-green)} OR {Gray, or blue-gray} OR {Unknown} AND
<What SHAPE was the BILL> = {Straight and slender} OR {Straight and thick} OR {Conical and slender} OR {Flattened} OR {Unknown} AND
<What LENGTH was the BILL> = {Very short} OR {Short} OR {Unknown} AND
What FACIAL or HEAD features were noted if any = {Light area between the bill and the eye} OR {Light area near or around the eye} OR {Crest of feathers on top of the head} OR {NONE or a PLAIN unmarked FACE} OR {Unknown} AND
What colour were the EYES = {Brown or blackish brown} OR {Black or dark gray} OR {Unknown} AND
What colour was the TOP of HEAD = {Olive (yellowish-green)} OR {Gray, or blue-gray} OR {Black, purple, or dark} OR {Unknown} AND
What was the predominant colour of the HEAD = {Olive (yellowish-green)} OR {Gray, or blue-gray} OR {Black, purple, or dark} 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} AND
WHEN was the bird seen = {Spring} OR {Summer} OR {Fall} AND
WHERE was the bird seen = {Southwestern United States}
THEN
Northern Beardless-Tyrannulet (Confidence: 1)