RULE: Gadwall (Male)

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

IF
What color was the UNDERSURFACE of the wing as seen in flight = {Light} OR {Unknown} AND
In FLIGHT did the bird display a LIGHT WING STRIPE or PATCH = {Yes} OR {Unknown} AND
What colour were the LEGS or FEET = {Orange, buff (orange-yellow), or tan} OR {Red, or pink} OR {Rufous (dull-red or rust-colored)} OR {Unknown} AND
What Color were the UNDERTAIL COVERTS = {Black, dark gray or dark} OR {Unknown} AND
What colour was the SIDE = {White, or pale (grayish-white)} OR {Gray, or blue-gray} OR {Unknown} AND
What colour was the BACK = {Orange, buff (orange-yellow), or tan} OR {Brown, or chestnut (reddish-brown)} OR {Gray, or blue-gray} 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 = {White, or pale (grayish-white)} OR {Orange, buff (orange-yellow), or tan} OR {Brown, or chestnut (reddish-brown)} OR {Gray, or blue-gray} OR {Unknown} AND
What colour was the BILL = {Blue} OR {Brown, or chestnut (reddish-brown)} 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> = {Medium} OR {Long} OR {Unknown} AND
What FACIAL or HEAD features were noted if any = {NONE or a PLAIN unmarked FACE} 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 = {Brown, or chestnut (reddish-brown)} OR {Gray, or blue-gray} OR {Unknown} AND
<How BIG was the bird> = {Crow-sized} OR {Goose-sized} AND
<What TYPE of bird was seen> = {Duck or Goose-like}
THEN
Gadwall (Confidence: 3)