RULE: Harlequin Duck (Male)

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

IF
What colour was the SIDE = {Red, or pink} OR {Rufous (dull-red or rust-colored)} OR {Brown, or chestnut (reddish-brown)} 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 = {Gray, or blue-gray} OR {Black, purple, or dark} OR {Unknown} AND
<What colour was the THROAT> = {Gray, or blue-gray} OR {Black, purple, or dark} OR {Unknown} AND
What colour was the BILL = {Blue} OR {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> = {Short} OR {Medium} 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 {Unknown} AND
What colour were the EYES = {Red, orange or rusty} OR {Brown or blackish brown} OR {Black or dark gray} OR {Unknown} AND
What was the predominant colour of the HEAD = {White, or pale (grayish-white)} OR {Blue} OR {Gray, or blue-gray} OR {Black, purple, or dark} OR {Unknown} AND
<How BIG was the bird> = {Pigeon-sized} OR {Crow-sized} AND
<What TYPE of bird was seen> = {Duck or Goose-like}
THEN
Harlequin Duck (Confidence: 2)