RULE: Allen's Hummingbird

IF: How BIG was the bird = {Smaller than a sparrow} OR {Sparrow-sized} AND
List any unique FEEDING or other BEHAVIOUR observed = {Feeding at flowers} OR {Chasing and harassing other birds in flight} AND
<What TYPE of bird was seen> = {ID by Unique Behaviour or Jizz} AND
WHERE was the bird seen = {Southwestern United States} OR {Northwestern Canada or United States}