There have been a number of releases of The Bird with the Crystal Plumage as the IMDb notes the film was: “originally cut in the US by 20 seconds to achieve a US "G.P." rating with edits to a razor slashing, and this print was then passed without further cuts for its original UK cinema release in 1970 (as "The Gallery Murders"). The film was re-released theatrically in the UK in 1983 (as "The Bird With the Crystal Plumage") and the full print submitted to the BBFC where it received 18 secs of cuts which removed all shots of a knife being traced over a woman on a bed and the slashing/removal of her nightdress and underwear. All video releases plus the 2005 Platinum Media DVD featured the same cut print, though the 2011 Arrow release finally presented the film fully uncut”.
For details of cuts to the DVDs see here.
Our Blu-ray is the same as the UK Arrow Region B Blu-ray, and is uncut.