Here's Barney once more, coming in to land on the entrance hole. He never flies straight in as Fluffy does.
Barney finally enters. This is about 40 seconds after he landed - presumably he has been hoping that Fluffy would appear.
Clearly, she didn't turn up and so he only stayed inside a short while before re-emerging and flying up to perch on the roof.
He's back on the entrance hole a few seconds later, presumably still hoping Fluffy will come along.
This last image for today shows Barney in flight. As you can see, it is now well into the afternoon