Update - Corrected flag code but similar story.
One of the many things that has come out of the Knot work at Formby is the vast amount of data being produced by a small team of dedicated observers which have made nearly 4,000 observations. These are all really valuable and without your help many an interesting pattern of movement or important bit of connectivity between sites would be missed.
An email last week was very interesting with the report of a Knot seen twice in Mauritania which had been ringed at Formby in 2017. I expected this to be either the bird that was seen on the Azores (although unlikely as it looked in pretty poor condition in the last photo) or the bird that was identified as canutus when we caught it in September 2017. It turned out to be neither of these and in many ways much more surprising.
Orange HA was indeed ringed in September 2017 at Formby as a moulting adult however was seen up until 29th October before disappearing. It's next sighting was in Mauritania this December.
This is the 18th recorded movement of a British ringed Knot to Africa with previous records in:
Congo - 1
Gabon - 1
Ghana - 1
Liberia - 1
Mauritania - 4
Morocco - 1
Mozambique - 1
Republic of South Africa - 3
Senegal - 4
16 of the 17 have been ringed as juveniles in August and September, the 17th ringed as an adult in July 1973 before being found in South Africa in December 1973. Additionally all but one of these were ringed on the East coast of the UK. These are all typical movements of Knot of the canutus race.
What makes HA particularly interesting is that it was in the UK so late into October when the previous latest record of a Knot in the UK going to Africa was 25th September. Clearly having a colour mark here helped get a closer to departure date than a single capture however a month later than the previous latest is surprising. Was this in the wrong place with a group of Knot not wanting to migrate or was it something else?
With metal ringing alone we might have had some details of it in Mauritania if conditions were good however we certainly would not have had any sightings in the UK post ringing. Similarly with the bird on the Azores - we may well have had enough photographs to identify the bird but again the intervening records would not be present as a result of the difficulty of approaching Knot in the UK in autumn and winter without causing disturbance. Once again this highlights the value of colour ringing difficult to monitor species such as Knot. We are not only getting excellent survival data thanks to the efforts of the local observers but we are also getting fascinating movement data from the global network of keen colour ring readers and one which I would recommend everyone tries as you never know what interesting bird movements you will record.
NLRG was formed in 1957 to help in the study of birds in the Lancaster and District Birdwatching Society area. There are currently 12 active ringers. Species currently being studied include: Pied Flycatcher, Bearded Tit, Sand Martin, Twite, Goosander, Oystercatcher and Grey Wagtail. Migration has been studied for 28 years at Heysham. We welcome anyone who wants to observe, help or perhaps wish to become a ringer. Photo: A Heysham-ringed Twite on the Mull of Kintyre (thanks to Eddie Maguire)
Sunday, 16 December 2018
Thursday, 6 December 2018
Goldfinch versus Greenfinch
So far to date we have ringed 962 Goldfinch our best year ever. Its interesting to look back over the years and trace the increase of Goldfinch both as a breeding bird in our area and of course as a bird at feeding stations where most of our birds are caught. Looking back to 1960 before mist nets we ringed 326 Greenfinch but only one Goldfinch! By 1984 were ringed 521 Greenfinch but just 24 Goldfinch. How things have changed to date this year we have ringed 517 Greenfinch but 962 Goldfinch.
The Greenfinch number is hearting though, for in recent years the disease trichomonsis has depleted the population we reached a low of 278 in 2015 but numbers have increased over the past three years.Goldfinch are apparently quite mobile at this time of year ,we had two movements between our feeding sites, one moved 40 Km.
This autumn has seen several quick movers, a Chiffchaff ringed on October 6th was in Dorset 4 days later. A Sedge Warbler ringed on 27th July was in NW France 16 days later. While a Reed Warbler ringed on August 8th was in southern Spain15 days later. It is only our 6th Reed Warbler from Spain compared to 29 from France.
The build up of Little Egret in recent years has been amazing. Peak numbers of course occur in late summer/early autumn. Colour ringing has shown that many of these are young birds, bred that year with sightings of birds ringed as nestlings usually in May or June from Kent, Lincolnshire and amazing of all, eleven from Wales. This year a new location was added with a nestling from Hartlepool in the NE. Interesting that so many move north after fledging, before moving south in late autumn winter.
Posted by North Lancs Ringing Group at 14:11 No comments:
Subscribe to: Posts (Atom)