Having suggested there was a strong probability the Nest 1 and 2 females had departed Kielder of course they both turned up the following day!
Early on Monday Ranger Gordon saw Mrs 37 when he was at the Nest 2 site; she was on the nest and the juveniles were sitting in branches of the old nest tree. Soon after streaming started she arrived on the nest and was present on and off until late afternoon.
On Nest 1 Mrs YA landed on the nest late on Monday afternoon and paid several short visits before the end of streaming at 19.15.
Neither female was observed during the first part of Tuesday. Footage has yet to be reviewed for later.
On Nest 1 on Monday another female was very much in evidence, spending about half an hour annoying the juveniles. She appeared at about 14.50, the first indication being the juveniles mantling and calling. The nestcam showed a series of low swoops by an unringed female.
Just before 15.00 the intruder landed on a tree behind the nest used by the Nest 1 family. The juveniles continued to mantle and shout and Round 2 began. This video from the ‘long shot’ camera shows a small part of the action.
The juveniles stuck to the nest despite some very close attention.
Eventually and without the appearance of an adult the intruder flew away. Possibly the same bird returned yesterday but YA was quick to leave his perch and chase her off. This image gives an idea of the size discrepancy (although YA was a bit further away) between YA, who is quite small even for a male, and the female intruder who looks large full stop!