Very nice article that tells you pretty much everything about the feral IRNs in London but what I liked best was the picture of the guy in a suit, and obviously on his way to work, with three IRNs on him eating from the apple he had gotten them. I was also greatly surprised to find out they had counted 8,600 breeding pairs - WOW!
https://londonist.com/london/great-outd ... ed-to-know