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Old Tuesday 30th June 2020, 11:53   #5
John Cantelo
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Join Date: Aug 2003
Location: Canterbury, UK
Posts: 6,464
Helm's 'Birds of Spain' (3rd edition 2016) states under Great Grey Shrike that "Status uncertain but probably a scarce winter visitor to the N(orth)". As you will be aware the species was poorly covered in field guides into the 1990s and even then until Iberian Grey Shrike was 'split' few people bothered to be precise about which "Great Grey Shrike" they saw. I imagine past records are too muddied by these considerations to draw any conclusion from them whilst that the status still remains 'uncertain' suggests they're very scarce or even rare. It's probably worth checking the Rare Birds in Spain website for confirmed records.
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