Checklist S54023800

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Nocturnal
Location
Brosscroft property

Owner Alexander Lees

Other participating eBirders
Nocturnal Flight Call Count
  • 2
Comments

8C mild, overcast, initially low cloud-base then lifting around 10 Visibility 1-2km then 8km+, light SW 1-2

Recorder out at 1850, a Blackbird ML146341791 was giving nocturnal flight calls (NFCs) in a neighbouring garden and launched itself into the stratosphere seconds later. Weather was looking good with light SW winds and low cloud so I assumed it would be good given the similarity to the mega movement last year- https://ebird.org/view/checklist/S43882436, and let local folks know. Checking back 20 minutes later we heard nothing so back to the TV. Then I got a message from Martin Sullivan in Glossop to say that Redwing were moving. Opened the door to a barrage of thrush NFCs and we sat outside till 10pm when the cloud base lifted and passage seemed to dry up. Steve Bailey and Tom Mckinney were also listening in the village, so we were able to track the movement which was clearly heading NE, with Steve hearing birds a couple of minutes before me and the bulk of the passage probably centered around the middle of the valley, with fewer birds to the south where Tom was. Waterbirds clearly leaving the Irish Sea coasts 80 km to the west and heading across the Peak District towards the North Sea via the Humber. Given a flight speed of around 92 km/h (Bergman & Donner 1964) then presumably the scoter left an hour or so after sunset. Only wings of 2-yr-old + male scoter reported to produce wing whirrs (Dement'ev and Gladkov 1967, Palmer 1976) which suggests that what we are hearing is a fraction of passage. Martin also had scoter over Glossop so passage likely broad front, but Longdendale still presumably a major bottleneck.

Bergman, G. and Donner, K. O. (1964). An analysis of the spring migration of the Common Scoter and the Long-tailed Duck in southern Finland. Acta Zoologica Fennica 105: 1-59.

Dement'ev, G. P. and Gladkov, N. A. (1967). Birds of the Soviet Union. Vol. IV. Jerusalem, Israel

Palmer, R. S. (1976). Handbook of North American birds, Vol. 2: Waterfowl. Part 1. Yale University Press, New Haven, CT, USA.

Submitted from eBird Android, version 2.0-beta15b

Observations

  1. Number observed: X

    Comments: Presumably local, birds moving around reservoirs NFC10

  2. Number observed: X

    Comments: NFC 25, several widely spaced groups

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  3. Number observed: X

    Comments: NFC4

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  4. Number observed: X

    Comments: NFC 90, biggest passage recorded here.

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  5. Number observed: X

    Comments: NFC hundreds - passage started at 2012, last at 2201, peak passage around 2120, initially just male calls, then some (female?) 'squeaky gate' calls then lots of wing whirrs and calls of both (sexes?) but more whirrs than calls, constant at one one point suggesting very large flocks of hundreds/thousands.

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  6. Number observed: 1

    Comments: NFC 6, two birds

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  7. Number observed: 1

    Comments: NFC 6 probably just one bird

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  8. Number observed: 1

    Comments: ID provisional, when heard in the field assumed to be Golden amidst the chaos, Tim Jones suggested Grey.

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  9. Number observed: X

    Comments: NFC5, at least two widely separated birds

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  10. Number observed: X

    Comments: NFC 6, two groups

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  11. Number observed: X

    Comments: NFC 1, probably this species, recording very faint, not suspected in the field

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  12. Number observed: X

    Comments: NFC3

  13. Number observed: X

    Comments: NFC7 multiple

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  14. Number observed: X

    Comments: NFC5, easily missed, probably more

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  15. Number observed: X

    Comments: NFC hundreds, probably fewer than Blackbirds, need to count the calls...

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  16. Number observed: X

    Comments: NFC hundreds, probably commoner than Redwing

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  17. Number observed: X

    Comments: NFC8, three groups

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  18. Number observed: X
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  19. passerine sp.

    Number observed: X
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  20. bird sp.

    Number observed: X
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