Thought I would give non-passerine birds a crack next

this one will probably not be quite as comprehensive as the mammal one, due to the much greater number of bird taxa in the UK and thus greater scope for error, but once again I will highlight any "unique in Europe" taxa with italics. I will also omit any native species, unless they are a non-native subspecies of particular note.
The list would, of course, be a lot more interesting were it not for the demise of Blackbrook Zoo......
AMAZON WORLD
Plate-billed Mountain Toucan (Andigena laminirostris)
Swainson's Toucan (Ramphastos swainsonii)
BEALE WILDLIFE PARK
Bare-faced Ground-dove (Metriopelia ceciliae)
BELFAST ZOO
Western Rockhopper Penguin (Eudyptes chrysocome chrysocome)
Wattled Jacana (Jacana jacana)
Blue-eyed Cockatoo (Cacatua ophthalmica)
Southern Violet-crested Turaco (Gallirex porphyreolophus porphyreolophus)
BIRDLAND
Siamese Fireback Pheasant (Lophura diardi)
Indian Grey Francolin (Francolinus pondicerianus)
Northern Carmine Bee-eater (Merops nubicus)
BIRDWORLD
Rufous-crowned Roller (Coracias naevius)
Blue-crowned Motmot (Momotus momota)
White Woodpecker (Melanerpes candidus)
BLACKPOOL ZOO
South African Ostrich (Struthio camelus australis)
Magellanic Penguin (Spheniscus magellanicus)
Tambourine Dove (Turtur tympanistria)
Long-billed Corella (Cacatua tenuirostris)
Baudin's Black-cockatoo (Calyptorhynchus baudinii)
CHESTER ZOO
Red-billed Curassow (Crax blumenbachii)
Kenya Crested Guineafowl (Guttera pucherani pucherani)
Philippine Scops-owl (Otus megalotis)
Mindanao Wrinkled Hornbill (Rhabdotorrhinus leucocephalus)
Green Aracari (Pteroglossus viridis)
COLCHESTER ZOO
Mindanao Rufous Hornbill (Buceros mindanensis mindanensis)
Sumatran Rhinoceros Hornbill (Buceros rhinoceros rhinoceros)
COTSWOLD WILDLIFE PARK
Masai Ostrich (Struthio camelus massaicus)
African Open-billed Stork (Anastomus lamelligerus)
COTSWOLD FALCONRY CENTRE
African Goshawk (Accipiter tachiro)
Chimango (Milvago chimango)
CURRAGHS WILDLIFE PARK
Australian White Ibis (Threskiornis moluccus)
EDINBURGH ZOO
Ocellated Turkey (Meleagris ocellata)
EXMOOR ZOO
Great Bittern (Botaurus stellaris)
Yellow-billed Stork (Mycteria ibis)
Southern Bald Ibis (Geronticus calvus)
Buff-necked Ibis (Theristicus caudatus)
Red-backed Amazon (Amazona festiva)
FRISKNEY PARROT SANCTUARY
Rueppell's Parrot (Poicephalus rueppellii)
Mulga Parrot (Psephotellus varius)
Bronze-winged Pionus (Pionus fuscus)
White-crowned Parrot (Pionus senilis)
Vinaceous Amazon (Amazona vinacea)
Orange-fronted Parakeet (Aratinga canicularis canicularis)
HAGLEY FALCONRY CENTRE
Himalayan Griffon Vulture (Gyps himalayensis)
ICBP DUNCOMBE
New Zealand Falcon (Falco novaeseelandiae)
ICBP NEWENT
Mountain Hawk-eagle (Nisaetus nipalensis)
JERSEY ZOO
Madagascar Crested Ibis (Lophotibis cristata)
St. Lucia Amazon (Amazona versicolor)
KIRKLEATHAM OWL CENTRE
Squacco Heron (Ardeola ralloides)
LIVING COASTS
Macaroni Penguin (Eudyptes chrysolophus)
Bank Cormorant (Phalacrocorax neglectus)
King Eider (Somateria spectabilis)
Red-legged Kittiwake (Rissa brevirostris)
Tufted Puffin (Fratercula cirrhata)
LOTHERTON BIRD GARDEN
Black Francolin (Francolinus francolinus)
Australian Thick-knee (Burhinus grallarius)
PAIGNTON ZOO
North African Ostrich (Struthio camelus camelus)
Elegant Crested Tinamou (Eudromia elegans)
Oriental White Stork (Ciconia boyciana)
Lesser Adjutant (Leptoptilos javanicus)
Grey Gull (Leucophaeus modestus)
Pacific Black-legged Kittiwake (Rissa tridactyla pollicaris)
Crested Quail-dove (Geotrygon versicolor)
Hooded Parrot (Psephotellus dissimilis)
PARADISE PARK HAYLE
Rajah Lory (Chalcopsitta atra insignis)
Northern Red-fan Parrot (Deroptyus accipitrinus accipitrinus)
St. Vincent Amazon (Amazona guildingii)
Buffon's Macaw (Ara ambiguus)
Mountain Parakeet (Psilopsiagon aurifrons)
Livingston's Turaco (Tauraco livingstonii)
PAULTON'S PARK
Sunda Pied Hornbill (Anthracoceros albirostris convexus)
Black-casqued Wattled Hornbill (Ceratogymna atrata)
RODBASTON ANIMAL ZONE
Singapore Scops Owl (Otus cnephaeus)
Ethiopian Eagle-owl (Bubo capensis dillonii)
SCOTTISH OWL CENTRE
Lilith Owl (Athene lilith)
Pallid Scops-owl (Otus brucei)
Sunda Scops-owl (Otus lempiji)
Magellan Horned Owl (Bubo magellanicus)
Western Great Horned Owl (Bubo virginianus subarcticus)
SHORELANDS
Hartlaub’s Duck (Pteronetta hartlaubii)
Sunda Teal (Anas gibberifrons)
Cabot's Tragopan (Tragopan caboti)
Barbary Partridge (Alectoris barbara)
Chinese Bamboo-partridge (Bambusicola thoracica)
Blue-headed Macaw (Primolius couloni)
SOUTH LAKES WILD ANIMAL PARK
Roseate Spoonbill (Ajaia ajaja)
TWYCROSS ZOO
Elegant Parrot (Neophema elegans)
WADDESDON ZOO
Black-spotted Barbet (Capito niger)
Spot-flanked Barbet (Tricholaema lacrymosa)
WARWICK CASTLE FALCONRY
African Crowned Eagle (Stephanoaetus coronatus)
Lammergeier (Gypaetus barbatus barbatus)
WELSH MOUNTAIN ZOO
Common Hoopoe (Upupa epops)
WEYHILL HAWK CONSERVANCY
East African Tawny Eagle (Aquila rapax rapax)
Northern Caracara (Caracara cheriway)
Pearl-spotted Owlet (Glaucidium perlatum)
WINGHAM ZOO
Western Crowned-pigeon (Goura cristata)
Biak Red Lory (Eos cyanogenia)
WOODHURST RAPTOR FOUNDATION
Crested Serpent Eagle (Spilornis cheela)
Eurasian Marsh-harrier (Circus aeruginosus)
WORLD OF OWLS
Marsh Owl (Asio capensis)
Sri Lankan Forest Eagle-owl (Bubo nipalensis blighi)
Leschenault's Brown Fish-owl (Ketupa zeylonensis leschenaultii)
WWT ARUNDEL
Dark-bellied Brent Goose (Branta bernicla bernicla)
WWT CASTLE ESPIE
Pale-bellied Brent Goose (Branta bernicla hrota)
WWT SLIMBRIDGE
Andean Flamingo (Phoenicoparrus andinus)
James Flamingo (Phoenicoparrus jamesi)
Lesser Whistling Duck (Dendrocygna javanica)
Pacific White-fronted Goose (Anser albifrons frontalis)
Taiga Bean Goose (Anser fabalis fabalis)
Richardson's Cackling Goose (Branta hutchinsii hutchinsii)
Small Cackling Goose (Branta hutchinsii minima)
Greater Brazilian Teal (Amazonetta brasiliensis ipecutiri)
New Zealand Teal (Anas chlorotis)
Australian Black Duck (Anas superciliosa rogersi)
Hawaiian Duck (Anas wyvilliana)
Pink-eared Duck (Malacorhynchus membranaceus)
Northern Cinnamon Teal (Spatula cyanoptera septentrionalium)
Redhead (Aythya americana)
South American Pochard (Netta erythrophthalma erythrophthalma)
ZSL LONDON ZOO
Asian Woolly-necked Stork (Ciconia episcopus episcopus)
Greater African Jacana (Actophilornis africanus)
African Gray-headed Gull (Chroicocephalus cirrocephalus poiocephalus)
Hartlaub's Turaco (Tauraco hartlaubi)