When we turned on this morning, we found Fay sitting on her chicks as usual.
All four chicks are still alive and kicking - but it appears that no more eggs have hatched.
What now takes place is something that we have never seen before.
It starts with Fay giving her nest a good rummage - a frequent occurrence and one that normally passes off uneventfully.
This time Fay seems particularly vigorous and one of her chicks gets squeezed to one side. Again - this is nothing new.
This is different though - as Fay turns head down in the nest cup, she squeezes the chick right out of the nest cup.
Fay is oblivious to all this and the chick is blind, so what happens next is not surprising.
As Fay finishes digging in the bottom of the nest, the chick starts crawling in the wrong direction - away from the nest cup!
I don't think Fay realises quite what is happening. She seems quite unaware of the chick's predicament.
At last, when the chick has got half way to the front of the box, Fay tries to drag it back.
She partially succeeds - at least she has managed to drag the chick nearer to home and got it pointing in the right direction.
But to no avail - the chick's meanderings take it away from safety again while Fay appears to do nothing.
Then, suddenly, Fay decides to go out for food!
A couple of minutes later and the chick has got almost as far from the nest cup as it is possible to be!
When Fay comes back, it is still there and has got itself partially covered by nesting material. You can just see a pink blob covered by nesting material and lying beneath the nest box hole.
Suddenly, Fay seems to become aware of the chick again.
She appears to hesitate, uncertain whether to try to help the chick or look after the three remaining chicks in the nest cup.
Clearly, she doesn't know what to do.
In the end she returns to the nest cup and her three remaining chicks.
Then, suddenly, she decides to go out for food again.
Some time during this morning, somebody drew our attention to the fact that a chick was out of the nest cup. We were concerned that if we tried to interfere, we may cause Fay to desert as she was already stressed by having no male to help her. We therefore decided to let nature take its course.
The final decider was the fact that the misplaced chick appeared to be the youngest of the four and therefore the least likely to survive anyway.
All of the above occurred within about 12 minutes of 10 o'clock. This picture was taken mid afternoon and showed that the chick was still there and that Fay was getting on with life without it.
Nothing had changed by the end of the day. The chick is still making the odd movement, showing that it is still alive, but has had nothing to eat since 10 o'clock and is clearly unlikely to survive the night.