Back in September 2020 I did a post called as above, Factory Peregrines, quite remarkably a pair of Peregrines had not only hunted inside a Factory, they then bred inside it. You can understand Kestrels possibly inside being more agile and definitely more suited to life inside, but open sky chase them down peregrines; you could not connect to limited airspace inside a large factory, let along breeding inside it.
Since then I have watched them regularly, completely at home and at times, spending more time inside than they do out, in 2021 they again bred inside fledging 3 juveniles.
The owners of the Factory have been incredible in working around the birds, it’s an active working factory and not always easy due to Schedule 1, but they have pulled out all the stops in accommodating the birds.
For the 2021 breeding season I made them a nest box, for 2020 when they were found, they had nested on a ledge in debris/pigeon guano, it was in a bit of a precarious position it has to be said. Fortunately for the peregrines, the owners gave them space and worked further away so not to disturb them, it worked and they fledged 2 juveniles.
Having placed the nest box for 2021 and placed in a higher position out of any work conflict with more of a distance buffer, I was hopeful of acceptance, sods law peregrines being the unpredictable beasts what they are bloody ignored it.
Instead they again bred on a ledge, a different location however, it was better positioned and there were no issues thankfully.
They fledged 3 juveniles in 2021, 2 males and a female, as you would expect all the juveniles were completely at home inside and like the adults, spent a lot of time inside the Factory right up to going there own way. To walk inside, look up and see 5 peregrines staring down at you from the rafters is surreal I can tell you, it always put a smile on my face, such an incredible adaptive species.
9 times out of 10 they will accept a nest box immediately, but occasionally it’s ignored in that 1st year when placed, especially if there are alternative positions available.
She's a big un
Falcon near nest box
For 2022 it is looking promising, to date I have seen the Falcon in it or close to it 3 times with the Tiercel in it and also near it on another 2 occasions.
Of course it’s all about the Falcon who will decide, so I am still keeping an open mind on it, they don’t always do the straightforward thing, however that is nature.
As females go she is a lump, I would go as far as saying she is the biggest Falcon I have seen, she is right leg metal ringed so can only presume that the colour ring snapped off. Looked into this in the past, it appears they do have a shelf life and will become brittle and snap after time.
I will find out this month whether she likes the box or not.