They're still around in Carroll Gardens on President St. and 3rd Ave, you xan see the coops from the street and they often called to my mind, how FBI stakeouts observed Sonny Black with his pigeons after learning about Donnie Brasco.
One time when I was about 12 or 13 I found one in my parent's yard and I called the Audubon Society and they tracked down the owner from the ID number on the legband and gave me his info, so I called him and he came and got the bird and gave me like $5 for buying birdseed and calling him, but he wasn't a Wiseguy.