Do Chickens Recognize Themselves in a Mirror?

Studies seem to point to the idea that chickens do recognize themselves when they look in a mirror.

Over the years, I've become known for adding various items to both my baby chicks' brooder, as well as the chicken coop to keep them busy, prevent them from getting bored, and provide enrichment for them. 

Things like perches, swings, hanging treat baskets, and even a xylophone (that was a failure - my chickens showed no musical ability nor interest at all!). Another item I like to add is a mirror. ...