RULE: MacGillivray's Warbler

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

IF
Did the WINGS have STRIPES or PATCHES = {No} OR {Unknown} AND
Was the RUMP or LOWER BACK light = {No} OR {Unknown} AND
What colour was the BELLY = {Yellow} OR {Unknown} AND
What colour was the BREAST = {Yellow} OR {Gray, or blue-gray} OR {Black, purple, or dark} OR {Unknown} AND
What colour was the THROAT = {Gray, or blue-gray} 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 were the EYE markings if any = {Light RING (white or yellow) AROUND the eye} OR {Unknown} AND
What was the predominant colour of the HEAD = {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} AND
WHEN was the bird seen = {Spring} OR {Summer} OR {Fall} AND
WHERE was the bird seen = {Southwestern United States} OR {Northwestern Canada or United States}
THEN
MacGillivray's Warbler (Confidence: 6)