RULE: Western Grebe

IF: What behaviour was shown in the water = {Sinking below the surface or with most or all of its body submerged} AND
Was the bird seen swimming in the water = {Yes} AND
How BIG was the bird = {Crow-sized} OR {Goose-sized} OR {Larger than a goose} 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}