Short Answer 
The dead bird in “Trifles” symbolizes Mrs. Wright’s oppression and loss of freedom due to her husband’s cruel nature. Mr. Wright’s dominating behavior leads to Mrs. Wright’s emotional decline, and the bird’s death highlights the tragic consequences of their abusive relationship.
Step 1: Understanding Symbolism in Literature
In literature, symbolism is a powerful device where authors use objects, characters, or events to represent larger ideas or themes. In “Trifles,” the dead bird symbolizes the oppression faced by Mrs. Wright, reflecting her emotional and mental state caused by her husband. This bird becomes a poignant representation of her lost freedom and happiness.
Step 2: Analyzing Mr. Wright’s Character
Mr. Wright is depicted as possessing a dominating and cruel demeanor that greatly impacts his wife, Minnie. Through his oppressive nature, he effectively suffocates her spirit, symbolized by the dead bird. The death of the bird showcases the extent of his tyranny, illustrating how his actions have led to a profound emotional decline in Mrs. Wright.
Step 3: Conclusion About the Symbolism’s Impact
The dead bird serves as a crucial symbol that resonates with themes of abuse and emotional repression. It represents not just the loss of a pet, but the broader implications of Mr. Wright’s behavior on his wife’s spirit. Ultimately, this symbolism drives home the tragic consequences of a cruel relationship, validating why Mr. Wright’s character is seen as destructive and oppressive.