Is this a newly fledged kingfisher with a fish?

I was in the kingfisher hide yesterday and saw this kingfisher dive from the middle post and come up with a tiny fish. I assumed it was the adult male at that time. But when i look at it on my computer, I see that it has no ring on its leg . I also think the beak is a bit shorter and the feet look still a little immature . Am I right in thinking this is a newly fledged juvenile returning to the site to catch some fish, a week after fledging?