I was participating in the RSPB birdwatch weekend so my garden was filled with lots of different garden birds and lots of seed/fat feeds. I left my spot for a moment and a family member spotted a bird they presume was black but feathers were turning blue/green in the light. She mentioned it also had a very long neck and it was roughly the size of a pigeon, possibly bigger. Definitely not a rook/crow or jackdaw. It left too quick so I didnt see it and she couldnt get a picture if it in time. I've been on the internet all night trying to ID this bird but nothings coming up, im stumped. Please help ID!! (Ps this was spotted in Northern Ireland)