Extinct Pet Bird Breeds
Brownwing budgerigar
Notes
The mutation responsible may have arisen again, thus qualifying as quasi-rediscovered?
References
https://extinctanimals.proboards.com/thread/4645/birds-amphibians-goldfish
London fancy canary
Last record: 1914-1918
References
Blakston et al, The Illustrated Book of Canaries and Cage Birds, (1878-81) p.184.
Cage & Aviary Birds, 2 September 2020
Mervilde, Didier. (2020). August 2020 edition of De Witte Spreeuwen. Photograph by Hein van Grouw.
https://finespangledsort.com/a-london-fancy-canary-circa-1850/
http://www.birds2u.info/london_fancy_canary.htm [deadlink]