RULE: Barnacle Goose

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

IF
What colour were the LEGS or FEET = {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 = {Black, purple, or dark} OR {Unknown} AND
What colour was the THROAT = {White, or pale (grayish-white)} OR {Black, purple, or dark} OR {Unknown} AND
What colour was the NECK = {Black, purple, or dark} OR {Unknown} AND
What colour was the BILL = {Gray, or blue-gray} OR {Black, purple, or dark} OR {Unknown} AND
<What SHAPE was the BILL> = {Flattened} OR {Unknown} AND
<What LENGTH was the BILL> = {Medium} AND
What was the predominant colour of the HEAD = {White, or pale (grayish-white)} OR {Unknown} AND
<How BIG was the bird> = {Crow-sized} OR {Goose-sized} AND
<What TYPE of bird was seen> = {Duck or Goose-like} AND
<WHERE was the bird seen> = {Northeastern Canada or United States}
THEN
Barnacle Goose (Confidence: 1)