In yesterday’s post about Ancroft’s fledge (got the name right now, rings are so much easier!) a fourth juvenile was present on the nest. She is proving to be a regular visitor.
Blue 8P is Ayle, from Nest 1A. She was first seen in a clip on Monday. She had possession of a fish and wasn’t going to share it. Press HD on all videos for best quality.
Later in the day, Ayle was on the nest as a clip began. The female was near her, but flew without trying to ease Ayle off.
Ancroft received a peck when he tried to take the fish.
In the evening, the adults ignored Ayle and the female fed Archer.
On Tuesday, Ayle was ready and waiting when the male brought lunch.
The female landed a little later. Ayle retained the fish.
Early yesterday it was back to normal as the Nest 3 youngsters dozed in light rain.
But by late afternoon Ayle was back and eating. Again!
Interruptions weren’t welcome.
It’s not uncommon for post-fledge juveniles to visit other nests in the area. At Kielder, we’ve seen brief landings in most years but typically the youngsters on the nest have mantled and jumped at the intruder.
Prolonged stays by “visitors” are rarely reported in the UK – but this may only be because there are relatively few osprey nests to be visited.
This article by Alan Poole describes his observations (in the USA) on a much higher-density population than Kielder. This longer-term type of nest visiting may be happening in the UK more often than we realise. The events on Nest 3 are similar to some of Poole’s findings. When she arrived, Ayle 8P was the only fledged osprey and is at least a week older than all the Nest 3 offspring. She is now behaving as the dominant youngster when food arrives, in so far as the footage shows. On Nest 1A, she was second-in-line and so probably in a less strong position at feeding times.
Archer and Acomb have still to fledge. Despite the upheaval and sometimes very limited space on the nest they are exercising. Archer seems to have overtaken Acomb – which she should, as the eldest.