By now, Green has become better acquainted with the crows than she likely ever expected. In fact, over the years she's seen them grow up to start families of their own, introducing a new generation to Green's welcoming fire escape.
"I've learned just how similar crow families and dynamics are to human families," she said. "They seem to have long-term relationships and to raise one or two children at a time in nuclear families. The parents are clearly actively teaching their children. They clearly want to show them where the nice lady lives and how to get treats from her."
Green says the experience with the crows has shown her how to "recognize and respect their personhood."
And, in the end, that may be the greatest gift of all.