RULE: Great Blue Heron

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

IF
What colour were the WINGS = {Blue} OR {Gray, or blue-gray} OR {Black, purple, or dark} OR {Unknown} AND
What colour was the BACK = {Blue} OR {Gray, or blue-gray} OR {Black, purple, or dark} OR {Unknown} AND
What colour was the BREAST = {White, or pale (grayish-white)} OR {Gray, or blue-gray} OR {Unknown} AND
What colour was the THROAT = {White, or pale (grayish-white)} OR {Orange, buff (orange-yellow), or tan} OR {Unknown} AND
What SHAPE was the BILL = {Straight and slender} OR {Straight and thick} OR {Unknown} AND
What LENGTH was the BILL = {Long} OR {Very long} OR {Unknown} AND
What colour were the CHEEKS = {White, or pale (grayish-white)} OR {Unknown} AND
What colour was the TOP of HEAD = {White, or pale (grayish-white)} OR {Black, purple, or dark} OR {Unknown} AND
How BIG was the bird = {Goose-sized} OR {Larger than a goose} AND
<What TYPE of bird was seen> = {Chicken-like marsh bird} OR {Long-legged wader}
THEN
Great Blue Heron (Confidence: 8)