RULE: Black-Crowned Night-Heron

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

IF
What colour were the LEGS or FEET = {Yellow} OR {Red, or pink} OR {Olive (yellowish-green)} OR {Green} OR {Gray, or blue-gray} OR {Unknown} AND
What colour were the WINGS = {Gray, or blue-gray} OR {Black, purple, or dark} OR {Unknown} AND
What colour was the BACK = {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 {Unknown} AND
What SHAPE was the BILL = {Straight and slender} OR {Straight and thick} OR {Conical and slender} OR {Conical and thick} OR {Unknown} AND
What LENGTH was the BILL = {Medium} OR {Long} OR {Unknown} AND
What colour was the TOP of HEAD = {Black, purple, or dark} OR {Unknown} AND
How BIG was the bird = {Crow-sized} OR {Goose-sized} AND
<What TYPE of bird was seen> = {Chicken-like marsh bird} OR {Long-legged wader} AND
<WHERE was the bird seen> = {Northeastern Canada or United States} OR {Northwestern Canada or United States}
THEN
Black-crowned Night-Heron (Confidence: 1)