Mrs G
Mrs G was first discovered breeding in the Glaslyn nest in 2004. It is also possible that she was the female osprey that a male was seen displaying to in 2003. It was mid-summer, the time we would expect to see two and three year old ospreys prospecting for partners.
Sadly she failed to return in 2023 for what would remarkably have been her 20th season breeding in the Glaslyn Valley.
How old was she? As she was not ringed we did not know her exact age and previous history, but we do have a few clues that might indicate her possible age. It is known that three-year old birds tend to arrive during April and two-year old birds tend to arrive from late May onwards. We know the exact date the chicks were killed in 2004 and can estimate their approximate age from their plumage. By working the dates back we can guess that Mrs G would have arrived approximately around the 20th April that year. Spot on for a three-year old bird. We know for certain Mrs G arrived on 22nd April in 2005, further supporting the case that she was a probably a young female. Inexperienced younger females also tend to have smaller broods, there were only two chicks in 2004 and only two eggs hatched in 2005, although three eggs were laid. We can therefore guess that Mrs G was probably hatched in 2000 or 2001, making her around 22 years old the last time we saw her in 2022.
How many eggs did she lay? At least 60 – we will never know how many she laid in 2004, but we do know there were at least two. 32 eggs with 11(98) and 23 eggs with Aran. The first five eggs in 2015 were either infertile or father unknown.
Breeding Years
2004 to 2022
Number of chicks produced
52 hatched
44 fledged
Apart from the two chicks that were killed in 2004, she also lost a chick in 2006 (the eldest, shortly before fledging) and 2007 (the middle chick at 16 days old – it had been knocked across the nest by a very lively mullet a couple of days before, maybe this was connected). In 2019 the middle chick died at 19 days old. A post mortem revealed that the cause of death appeared to be pneumonia and lung haemorrhage associated with lungworm infestation, together with acute blood loss anaemia. The report also indicated that the middle chick was likely to have been a female.
During 2021, Aran was injured during a storm just days after the first two chicks had hatched and as the third chick was hatching. He was unable to provide fish during this critical early period in their lives and tragically all three chicks died within a week of being hatched.
Mrs G returned in 2022 for her 19th breeding season in the Glaslyn Valley and following an early season ‘brief encounter’ with Z2 / ”Aeron” on the FotO Pont Croesor Nest, she was reunited with Aran to successfully raise a family on the Glaslyn nest for what was to be the last time.
Grand-chicks
130 that we currently know about!
Great grand-chicks
13 so far.
11 (98)
Ochre 11 was hatched at a nest near Aviemore in 1998, before being taken to Rutland Water in July that year as part of the ongoing translocation project. At Rutland he was a fairly dominant youngster, frequently taking fish from other birds in his holding pen. He was released on 7th August and took an hour to leave the pen. Surprisingly given his subsequent history, he spent several weeks around the vicinity of the reservoir. He was never spotted at Rutland Water as an adult.
In the mid-summer of 2003 local birdwatchers were sure they had seen a male osprey displaying and it was believed that a second osprey was around. It was too late in the season for breeding, but it was hoped that there was a prospecting pair present. In 2004 11(98) was discovered breeding at the Glaslyn nest with Mrs G, although the pair lost their two chicks when the nest slipped during an unseasonal storm. It is very likely that 11(98) was the male osprey that had been seen displaying to a female in 2003.
He wore his ochre plastic darvic ring with the number 11 until 2007, when he confused everyone by arriving back without it. He did not appear to like flounder and was never seen to bring one back to the nest. His favourite fish were mullet and trout and he could often be spotted fishing at Pwll McAlpine, along the Porthmadog Cob. He was a very distinctive osprey and it was always a welcome sight when he was spotted fishing from the cob.
He was last seen on 4th September 2014 when he was 16 years old.
Breeding Years
2004 to 2014
Number of chicks produced
30 hatched
26 fledged
Aran
Unringed male, arrived at Glaslyn on 30th April 2015. Given the name Aran because when he first arrived, looking from the Visitor Centre, he kept flying in the direction Nantmor and appeared to be flying towards Yr Aran, the mountain peak south of Snowdon. It was also an easy name for to pronounce for non-Welsh speakers.
Aran arrived at the time we would expect to see prospecting two or three-year old ospreys. His behaviour during his first breeding year suggested that he was not an experienced male and his plumage was not what we would expect from a more mature male. Matings were less frequent than we had seen with the old pairing and he appeared rather unsure of how to behave when left alone with the young chicks. For instance, when the chicks were around two weeks old, he made no attempt to feed them when Mrs G was absent for several hours chasing away intruding ospreys, even though they were food soliciting for the fish he had bought to the nest. He is a great provider of fish however, bringing back a large variety of marine species, such as garfish, flounder and sea bass, as well as trout and mullet. He proved to be more experienced in the mating stakes during his second breeding year, as he was also spotted mating with Blue 5F. In June 2016 he demonstrated that he was more confident with the chicks, by feeding them himself for the first time.
During a raging storm on the evening of 20 May 2021, Aran left the nest to fish for his growing family. We did not see him again until the middle of the following afternoon, when the storm was finally calming down. Aran did not have a fish and it was clear from his demeanour that something was not right. Mrs G had fed the remaining scraps of the previous days fish to the chicks during the morning and the very young chicks needed feeding urgently. We realised that Aran had sustained an injury to his right wing and he was clearly fatigued.
After seeking expert advice, we decided to provide supplementary fish near to the nest, in an attempt to give the young family a chance of survival. Sadly, our efforts were not successful and the three chicks died over the course of the following few days. However, the fish we provided gave Aran the opportunity to rest and recover and within two weeks he was catching small fish and another two weeks later he was able to catch reasonably sized fish once again. It was too late in the season for a second breeding attempt, but Aran and Mrs G remained together defending their nest from intruding ospreys. By the end of the season, we were confident that Aran had made a full recovery.
Although he was later returning in Spring 2022 compared to more recent years, he arrived back on the Glaslyn nest on 10 April and soon was re-joined by Mrs G for another successful breeding season.
Number of chicks produced
26 hatched
22 fledged
Elen
Elen is unringed and was first seen at the Glaslyn nest on 3 April 2023. Mrs G had failed to return from her migration. Aran and Elen bonded, and produced two male chicks.
Elen is named after Yr Elen, a mountain in the Carneddau range of Eryri. She is likely to be a three-year-old osprey and from her behaviour, she is believed to be breeding for the first time.
Number of chicks produced
2 hatched
2 fledged
Blue 5F
Hatched at the Rutland Site K nest in 2012. Her mother is the satellite tagged female Yellow 30 (hatched at the Rutland Site B nest in 2005) and her father was the translocated Rutland male Red 08 (2001).
In December 2013, Blue 5F was photographed by Chris Wood at Tanji Marsh in Gambia, she was 18 months old at the time and would not yet have made a return journey to the UK. In December 2014 Chris returned to Tanji Marsh and he again found 5F settled for the winter there. She had not been spotted back in the UK during the summer, although it is likely she would have travelled north as a two-year old. On 9th April 2015 Blue 5F was captured on camera again, as she landed on the perch of the Glaslyn nest, this was the first sighting of her in the UK as an adult. She remained in the Glaslyn area during the summer and intruded at the Glaslyn nest on several occasions. By the middle of October we heard the news via Fansu Bojang and Chris Wood that 5F was back in her wintering quarters in Tanji Marsh.
On 29th March 2016 Blue 5F landed on the perch at Glaslyn once again. Two days later she was in a skirmish with her cousin Blue 24 at the Dyfi nest. Glesni, another cousin, who was the resident female at Dyfi, had not yet returned. Before long, 5F was back on a favourite nesting platform in the Glaslyn area. Aran was spotted mating with her on several occasions and for a while she appeared to be incubating eggs. The nest failed however and 5F soon resumed her regular intrusions at the Glaslyn nest.
During the winters of 2016 to 2019, 5F was once again settled in her wintering quarters in Gambia, where Chris Wood photographed her for the fourth and fifth consecutive years. During the winter of 2018 she spent the majority of her time in the Tujereng Beach area of Gambia, although she was spotted at Tanji again in autumn 2019.
On 1st April 2020, 5F appeared on the camera that had been installed by NRW at the Llyn Clywedog Osprey nest in mid-Wales. On 3rd April she also appeared on the Glaslyn nest, before being seen off by Mrs G. The following day she returned to Clywedog and was soon joined by the resident male, Dylan. The original female, Delyth, failed to return and 5F became Dylan’s new mate. Together they raised three male chicks and all three successfully fledged. A very happy outcome – Congratulations 5F!