Wasp inspected the California roll in bento box at sushi lunch today; pulled three bits of the crab from one of the pieces; carefully cleaned its antenna after each 'taste' and left all three pieces on top. (I wonder if it would have rejected real crab.)
It then wandered around the table … and the box … and the diner … searching for salmon. Previous observations have shown it prefers salmon and will choose it over tuna etc.
Finally I dug a piece from the tail of a tempura prawn and wasp settled down and ate.
(click on photo to enlarge; click above object to enlrge again)