The liaison between Nest 1 YA and the Nest 2 female ‘Mrs 37’ always had a high ‘potential disruption’ factor. Usually successful breeding pairs will re-establish their relationship when one arrives later than the other and a dalliance has occurred.
When the behaviour – mantling by YA especially (the female was protecting a newly delivered meal) and both following something around the sky – suggested an intruder was around today we hoped 37 was about to send his younger brother packing. Politely!
But it was an unringed intruder who eventually landed on the nest for a couple of seconds despite YA having flown off to try and deter such a bold act. He had been followed soon after by the female. For about 15 minutes only the fish inhabited the nest – oh, for a wide angle camera!
After the intruder left YA arrived – too late! – then he went after the intruder only for the sneaky visitor to circle round and land again. Here is a video of the final encounter between the three on the nest.
After another short absence the female returned although without the fish. YA landed briefly to show her he was still the chap for her.
But he wasn’t seen again before the streaming ceased. A quick check on Nest 1 from the opposite side of the reservoir showed a very pale chested osprey sitting on top of the nestcam pole. The bird definitely wasn’t the very dark chested female ‘Mrs YA’. The chances are it was YA.
Has the intruder disrupted the YA/Nest 2 female liaison? The intruder was possibly male. Although the chest markings were quite dark and deep the stance and long slim legs were more suggestive of a male. Is that bird still around and if so has he designs on the Nest 2 female? Intriguing times at Kielder.