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| Taking flight - but not landing a place on the British List |
THE records committee of the British Ornithologists' Union has decided not to add the Pied Crow to the British List.
Members reached their verdict unanimously after considering a bird that spent the period between June 13, 2018, and May 21, 2019, in various parts of England and Wales.
The committee's report states: "The Pied Crow is an abundant species of sub-Saharan Africa, Madagascar, Aldabra and Comoros.
"It is largely sedentary though, in some areas, seasonal movements may be dictated by rainfall.
"Instances of vagrancy to temperate Europe by birds of Afrotropical origin are exceptional but ship-assisted passage is a potential means of arrival.
"However, there are only a small number of documented records of Pied Crow actually aboard ships: at sea off Western Sahara and around the Canary Islands, and there is also possibility that these records concerned individuals known to have escaped on the Canary Islands."
In chronological order, the British sightings over a period of 12 months included:
* Easington, Kilnsea and Spurn, Yorkshire
* Gibraltar Point, Lincolnshire
* Great Yarmouth, Winterton-on-Sea, Caister-on-Sea, Cromer, East Runton, Norfolk
* Clevedon, Avon
* Pencarnan, Pembrokeshire
* Thornwick Camp and Flamborough, Yorkshire
* Spurn, Yorkshire
* Gibraltar Point, Lincolnshire
* Holland Haven, Essex
* Winchelsea, Seaford, and Litlington, Sussex,
* Cot Valley, Land’s End, St Just and Nanjizal, Cornwall
* Clovelly, Lundy, Morte Point, and Woolacombe, Devon
* Dover, North Foreland, St Margaret’s at Cliffe, Foreness Point, Swalecliffe, Broadstairs and North Foreland, Kent
Crucially, the committee noted that "on June, 8, 2018, a Pied Crow briefly visited a ship travelling from Russia to Britain in the south-eastern North Sea".
In all likelihood, this was the bird that went on to spend time flying hither and thither on the mainland.
The report continues: "The committee's policy towards ship-assisted vagrants is not to admit port-to-port or coast-to-coast transportees on to the British List.
"Suspected ship-assisted birds should only by admitted to the List if the species is considered capable of making an unassisted crossing under favourable circumstances.
"The committee did not consider the 2018-2019 Pied Crow to be a vagrant and voted unanimously to not add the species to the British List which thus remains at 636."
The committee consists of:
Chair: Alexander Lees (Manchester Metropolitan University)
Secretary: Chris Batty (Lancashire)
Members:
Ross Ahmed (Tyne and Wear)
Pierre-AndrĂ© Crochet (Centre d’Ecologie Fonctionnelle et Evolutive, France)
Mark Golley (Norfolk)
Andrew Holden (ex officio, BBRC)
Mark Thomas (RSPB)
Jane Turner (Cheshire)
Leila Walker (BOU Chief Operations Officer)
BOURC Category F Sub-committee:
Prof Umberto Albarella
Jo Cooper (British Museum)
Dr Dale Serjeantson
Dr John Stewart
BOURC consultants:
Steve Dudley (Category C consultant; former BOU Chief Operations Officer)
Martin Stervander (National Museums of Scotland, museums consultant)
Keith Naylor (historical records consultant)
The Wryneck says: Few will object to the record committee's verdict, but it needs to clarify its policy on ship assisted birds. What, for instance, is its definition of a port? Solely the point at which the vessel is anchored - or the wider environ which may extend to 100 metres or more? As for the line about whether a bird is "considered capable of making an unassisted crossing under favourable circumstances". That is a whole debate in itself.