I just found something I think might be quite interesting - was looking on the CABI (Invasive Species Compendium) page for the Egyptian goose and found this particular quote under the distribution heading:
'The species is recorded to have been native in parts of the Danube Valley in southeast Europe until the early eighteenth century... the extent of this distribution in relation to current national borders is incompletely known, however'.
Now very interested, I followed one of the links included (Blair
et al., 2008) and there it said that the species naturally bred from southern Hungary downstream to Romania.
A bit awkward that, if my understanding is correct, a formerly native European species is now being completely banned from being kept in the EU.
The CABI page is included below:
Alopochen aegyptiaca (Egyptian goose)
The paper by Blair
et al., is included here; the information about the Egyptian goose's former European native range is on page 41:
https://www.unep-aewa.org/sites/default/files/document/inf2_17_non-native_0.pdf