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  • Ian Hartley
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    Post count: 61
    in reply to: Pink-footed Geese #4055

    25th Sept
    Pink-footed Goose
    Some further totals:

    240 mostly S or W over Blea Tarn 0845-0915
    1870 south over Conder Green 0920-1105
    2410 south Cockersands 1120-1320

    Ian Hartley

    • This reply was modified 3 weeks, 4 days ago by Ian Hartley.
    Ian Hartley
    Participant
    Post count: 61
    in reply to: Geese #4027

    20th Sept

    20 pink-footed geese heading west over Lancaster University (14:20)

    Ian Hartley

    Ian Hartley
    Participant
    Post count: 61
    in reply to: Conder & Glasson #3981

    Record shot, just about.

    • This reply was modified 1 month, 1 week ago by Ian Hartley.
    Ian Hartley
    Participant
    Post count: 61

    8th Sept

    Conder green
    Little Grebe 25 on pool (a personal high count)
    Greenshank 4
    Raven 2

    Cockersands lighthouse area
    Mediterranean Gull 1 ad on water
    Woodpigeon 275 on recently cut stubble field
    Eider 1 between lighthouse and plover scar

    Ian Hartley

    • This reply was modified 1 month, 1 week ago by Ian Hartley.
    Ian Hartley
    Participant
    Post count: 61

    Thanks for the Avocet record John – 6V was ringed as a chick at Conder Green on 1/6/21, was at Leighton Moss on 14/7/21, then was photographed at Alkborough in north Lincolnshire on 31/7/21 and again on 13/8/21 and 18/8/21, and is now back – rather surprisingly. It was reported by someone else on 26th but it is useful to get a second observer to provide corroborative evidence, so thanks for posting.

    Do you have an approximate time for your sighting please?

    Ian Hartley

    • This reply was modified 1 month, 3 weeks ago by Ian Hartley.
    Ian Hartley
    Participant
    Post count: 61
    in reply to: Conder Green #3845

    Thanks for the avocet sighting Barrie. 6J is one of two from the last brood to hatch, and is an offspring of one of the birds fledged at Conder pool in 2020.

    Ian

    Ian Hartley
    Participant
    Post count: 61
    in reply to: Conder & Glasson #3829

    Great Black-backed Gulls are not particularly regular at Blea Tarn, but at the moment there are quite a few Lesser black-backed gull families there, presumably having left the inland fells where they breed, so I assume this GBBG pair and young are also from up there too. Guesswork really, but it makes most sense.

    Ian

    Ian Hartley
    Participant
    Post count: 61
    in reply to: Conder Pool #3697

    Note that the juvenile Common Terns reared on Conder Pool have got a red ring with a 3 digit number, so I’d be grateful for time and date of any that are recorded here or elsewhere. All records of birds reared at the pool are useful so that we have a better idea of when they leave. Common and Sandwich Terns ringed at Hodbarrow in Cumbria are already being seen on their way south.

    Thanks
    Ian Hartley

    Ian Hartley
    Participant
    Post count: 61

    To add to this for same area:

    Colour ringed curlew seen on 8th March. Ringed as adult, 18/12/2017 at Llanrhystud, Ceredigion, Wales. Since then it has been recorded on three further occasions, all at Breydon water, Great Yarmouth, Norfolk: 22/08/2019, 24/11/2019 and 15/09/2020.

    Neck collared Greylag Goose seen on 8th March. Ringed as adult, 25/6/2016 at Ambleside, Cumbria.

    There is also a Canada Goose with a colour ring from Windermere but I haven’t had it close enough yet.

    Finally, the remains of a predated kingfisher on 8th March, scattered on path near fishermen’s shelter.

    Ian Hartley

    Ian Hartley
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    Post count: 61

    Grey collar VCN was ringed at Martin Mere on 22nd March 2018. I saw it on 3rd Feb 2019 at Lower Thurnham fields.

    Ian Hartley

    Ian Hartley
    Participant
    Post count: 61

    The yellow colour in feathers is made from a component in the birds’ diet called carotenoids. Carotenoids are a family of chemicals made by plants which tend to be pigmented – so they form the orange in carrots and the red in tomatoes and other fruits. For birds, these cannot be made by physiological processes and need to be taken in as part of the diet. The intensity of the yellow is determined by a couple of factors at the time when the bird moults in autumn – first, the level of carotenoids in their diet and secondly their ability to use the carotenoids. Carotenoids serve several functions, as well as adding colour to the feathers, which might increase the chances of getting a mate, they are also used in immune system function and, for females, are deposited in egg yolks, which increases offspring quality. These various trade-offs can affect the plumage colour intensity. For example, if a bird is ill or has a large parasite load at the time of moulting, it might use up the carotenoids to bolster the immune system in defence of its health, so the feathers emerge rather paler than they would on a healthy bird or a bird that has access to a high quality food source. Some of these effects are also likely to be associated with age and sex.

    This is a big field of research because of the link between individual quality and the plumage signal/marker. So if you want to read more, a google search on ‘carotenoid bird plumage’ will throw up plenty of results. Work by Geoff Hill and Kevin McGraw has been particularly important.

    Ian Hartley

    Ian Hartley
    Participant
    Post count: 61
    in reply to: Ringed blue tit #1840

    Yes those are going to be birds from the Lancaster University campus. Breeding adult blue tits are colour ringed and nestlings get a metal ring.
    Ian Hartley

    • This reply was modified 10 months, 2 weeks ago by Ian Hartley.
    • This reply was modified 10 months, 2 weeks ago by Ian Hartley.
Viewing 12 posts - 1 through 12 (of 12 total)