Last night at shortly before 18.00 there was another intruder incident at Nest 2. 37 was incubating when he started alarm calling.
He flew off after the unseen intruder and Mrs 37 went onto the eggs. Peace was restored for 10 minutes but then she began calling and mantling.
An intruder came into sight and flew at Mrs 37 who accidentally kicked an egg out of the cup.
Mrs 37 chased the intruder off and returned within a minute. But she ignored the egg on the side of the nest. It was still there this morning.
Mrs 37 has stood off the three eggs several times, moving to the edge near the abandoned egg. She has looked at it, but not tried to return it to the cup.
Although at Loch Garten this year one of the eggs kicked to the edge by an intruder was returned to the cup a few days later and incubated it is more usual for the parents to ignore an egg on the side of the nest.