RULE: Brant

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

IF
In FLIGHT did the bird display a LIGHT WING STRIPE or PATCH = {No} OR {Unknown} AND
What colour were the LEGS or FEET = {Blue} OR {Gray, or blue-gray} OR {Black, purple, or dark} OR {Unknown} AND
What Color were the UNDERTAIL COVERTS = {White or pale (grayish-white)} OR {Unknown} AND
What colour was the BACK = {White, or pale (grayish-white)} OR {Brown, or chestnut (reddish-brown)} 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 = {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 FACIAL or HEAD features were noted if any = {Light area up the side of the neck or head} OR {NONE or a PLAIN unmarked FACE} OR {Unknown} AND
What was the predominant colour of the 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> = {Duck or Goose-like}
THEN
Brant (Confidence: 3)