Not sure, couldn't get a better picture
This is a camera I set up in my mom's bird house, it looks like maybe it has a blue tail? But it might be the lighting playing tricks. It is a blue bird box I purchased with a 1.5" steel predator guard at the opening that it would have to fit through.
The only pair of Subantarctic Skua on The Pyramid Tarakoikoia. They nest near the campsite. The first photo they have a Chatham Albatross chick.