Orkney Black Guillemot breaks longevity record
by BTO
Black Guillemot (© Edmund Fellows)
by BTO
In July 1997, a Black Guillemot chick was ringed in Orkney. This bird successfully fledged from its nest and lived for nearly 25 years without being seen again. In May 2022, the bird was recaptured, still in Orkney, making it the oldest-known Black Guillemot in Britain and Ireland! This is one of the new records that has just been published in the British Trust for Ornithology’s (BTO) latest ringing and nest recording report, charting the remarkable lives of our birds.
Fitting uniquely numbered rings to chicks in the nest allows scientists to understand exactly how long birds live and to work out how, and potentially why, the numbers that survive change over time. Seabirds like the Amber-listed Black Guillemot can live for a long time but do not produce many young each year. This life history strategy makes their populations particularly vulnerable to periods of increased mortality, such as those caused by Highly Pathogenic Avian Influenza (HPAI), which has had a devastating impact on our seabird and waterbird populations over the past three summers.
Britain and Ireland host the majority of Europe’s breeding seabirds, meaning our breeding colonies are of international importance and HPAI could threaten the global conservation status of some species. More positively, there are indications that some seabirds, such as Gannet, which were especially badly impacted by HPAI in 2022, may be developing immunity to the disease, but more research is needed to confirm how long this immunity might last.
Details of the other new longevity records, set in 2022 (for BTO-ringed birds) appear below. In each case the record is shown after the species name, which is then followed by the ringing details (second line) and finding details (third line); the fourth line shows the distance between ringing and finding, and the time elapsed between the two. The final line shows any comments on the record and this bird.
White-fronted Goose (19 years 1 month 25 days)
- Ring number 1350933 Adult Female 25-01-2003 Slimbridge Swan Pipe (Gloucestershire)
- Alive (neck collar seen) 22-03-2022 Gac, Podalskie Poland
- 1,669 km 19 years 1 month 25 days
- Previous record: 18 years 9 months 22 days
Little Egret (16 years 6 months 15 days)
- Ring number GF49953 Nestling 11-06-2006 Sowley Pond (Hampshire)
- Alive (colour rings seen) 26-12-2022 Pennington (Hampshire)
- 4 km 16 years 6 months 15 days
- Previous record: 15 years 2 months 27 days (same bird)
Avocet (31 years 7 months 27 days)
- Ring number ER2787_$2 Nestling 02-07-1990 Titchwell RSPB Reserve (Norfolk)
- Alive (colour rings seen) 01-03-2022 RSPB Titchwell Marsh (Norfolk)
- 0 km 31 years 7 months 27 days
- ***Cannot be identified to an individual – one of two. Known age of bird confirmed, but not identity.***
- Previous record: 27 years 9 days
Green Sandpiper (11 years 4 months 25 days)
- Ring number BV13418 First-year 14-11-2010 Lemsford (Hertfordshire)
- Alive (colour rings seen) 08-04-2022 Symondshyde Farm (Hertfordshire)
- 3 km 11 years 4 months 25 days
- Previous record: 11 years 1 month 17 days (same bird)
Redshank (22 years 2 months 17 days)
- DB34864 First-year 28-09-2000 Farlington Marshes (Portsmouth)
- Alive (colour rings seen) 15-12-2022 Eastney (Hampshire)
- 4 km 22 years 2 months 17 days
- Previous record: 20 years 8 months 23 days
Stock Dove (10 years 26 days)
- Ring number EL36399 Adult Male 01-06-2012 Thetford: 52°24'N 0°45'E (Norfolk)
- Caught by ringer 27-06-2022 Thetford: 52°24'N 0°45'E (Norfolk)
- 0 km 10 years 0 months 26 days
- Previous record: 9 years 2 months 12 days
Barn Owl 15 years 7 months 2 days)
- Ringing number GC25454 Nestling 24-08-2006 near North Wootton (Norfolk)
- Freshly dead 26-03-2022 near Swaffham (Norfolk)
- 29 km 15 years 7 months 2 days
- Previous record: 15 years 3 months 21 days
Chough (23 years 10 months 26 days)
- Ring number ET54746 Nestling Male 18-05-1998 Site Confidential: c. 53°25'N 4°19'W (Isle of Anglesey)
- Alive (colour rings seen) 13-04-2022 (Isle of Anglesey)
- 23 years 10 months 26 days
- Previous record: 23 years 11 days
Bearded Tit (8 years 10 months 22 days)
- Ring number D413294 Full-grown Male 29-10-2013 Tay Lodge (Perth and Kinross)
- Caught by ringer 20-09-2022 Tay Lodge (Perth and Kinross)
- 0 km 8 years 10 months 22 days
- Previous record: 7 years 3 months
House Sparrow (13 years 8 months 22 days)
- TL62834 Juvenile Male 08-07-2008 Bedwas (Caerphilly)
- Alive (colour rings seen) 30-03-2022 Bedwas (Caerphilly)
- 0 km 13 years 8 months 22 days
- Previous record: 12 years 8 months 27 days
Sightings of ringed birds can be submitted to www.ring.ac
Dr Dave Leech, head of the British and Irish Ringing Scheme, says: ‘Ringing will play a key role in monitoring HPAI impacts, as it allows conservationists to follow the fortunes of individual birds, each with a slightly different likelihood of encountering the disease. To date, the amazing efforts of volunteer ringers have helped BTO and the Country Agencies to identify those species and colonies that have been impacted worst by the disease and to quantify the increase in mortality rates during the outbreak. Whether HPAI is here to stay or not remains to be seen but, whatever happens, these data will prove vital in terms of managing populations and supporting their recovery.’
14 November 2023
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