One of the greatest failures of my life to date (along with my sons’ shameful inability to eat apples correctly, down to the core) is my inability to attract a “crow bro”. That’s a corvid companion, and more and more people apparently have them, including Washington Post journalist Caitlin Gibson, who recently wrote about hers, Cormac, a charismatic fish crow with a taste for cashews.

It’s not a new phenomenon – Charles Dickens had a pet raven, Grip; Truman Capote had a crow called Lola – but thanks to CrowTok (a wholesome online enclave where people post........

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