Woodpigeon taking his egg for a walk?

I just wondered if anyone has ever come across this in their garden,.... A wood-pigeon visited our garden one morning about a month ago, maybe less and was feeding off the bird bath feeding table that we had only put there the day before. My husband and I were observing as he was walking around the bird bath and reaching for the seeds, when we noticed something in between its legs,... We took a photo to be able to zoom in and get confirmation that we were seeing right,... an egg! He was walking around with an egg between his legs!! I don't know if it was just stuck somehow to his feathers but it was quite funny and unusual to watch. I just hope that the egg didn't come loose before he got back to the nest,... I have attached the photo to this post but it's the first time that I use this forum, so I am not sure it has worked,...