Just Googled birds auschwitz and found this interesting webpage.
The Birds of Auschwitz Walking through Poland in the footsteps of ancestors
By Toby Saltzman
Travel Terrific
also
Auschwitz: 'It's Amazing That a Bird Can Sing Here' by Barbara Beckwith Auschwitz: 'It's Amazing That a Bird Can Sing Here' by Barbara Beckwith
Thought I'd start a thread on BirdForum, only a few replies but seems those that who have replied haven't seen or heard any there either.
Birds at Auschwitz ? - BirdForum