RULE: Bigbird - eBirdr

IF: What colour was the BREAST = {Yellow} AND
What was the predominant colour of the HEAD = {Yellow} AND
<How BIG was the bird> = {Larger than a goose} AND
<What TYPE of bird was seen> = {Songbird} OR {Chicken-like ground bird} OR {Chicken-like marsh bird} OR {Long-legged wader} OR {Duck or Goose-like}