Answer:
The audience knows about the deceased bird hidden in the box, but the men in the play do not.
Step-by-step explanation:
Dramatic irony is a type of irony where an audience is aware of a situation whereas other characters are not aware and act in ignorance.
An example of this dramatic irony in this scene of the play Trifles is that the audience know about the deceased bird hidden in the box, but the men do not know.