What is the evidence that only the women notice in Trifles?

The evidence that only the women notice in this excellent
play is the dead bird that was obviously killed by John Wright and then carefully
wrapped in silk and stored in Minnie Wright's sewing basket. This of course is crucial
evidence, because from Mrs. Hale's knowledge of both John and Minnie Wright and what a
bleak man that John Wright was, we can assume that John Wright killed the bird. The way
that the bird's neck is described as being "wrung" likewise ties in with the way that
John Wright himself was killed, which suggested that Minnie Wright, in an explosion of
anger, much like the anger that Mrs. Peters felt when a boy took up a hatchet and killed
her kitten in front of her. Note what Mrs. Hale concludes from seeing the
bird:

No,
Wright wouldn't like the bird--a thing that sang. She used to sing. He killed that,
too.

Thus it is that
ironically the women, through discovering the bird, also solve the crime that the men
are not able to find any evidence concerning.