isobea wrote: You know, I never found goldfinches to be delicate birds, neither in Germany (in an indoor aviary)nor here where I have kept them since 1986 in my outside aviary.
well Iso, have bred them for about my whole life and my father was breeding them way before i was born and trust me they are very delicate birds.
meaning you change their diet (say cant find anymore the mix you feed them) and you will see changes in their health. You feed them more green or fruit then you normally wood and they will get affected.
You accidentally doped the broom on their cage while cleaning, boom one of them gets stressed out and sick.
Say it rains heavily for a month (if you have them outdoors) and the humidity raises quick, ohh you will have many youngs affected from coccidiossis.
This is what i mean with delicate and if you compare them to other finches i dont think it would be the same. I have bred other european finches and none of the other species would be this delicate.
BUT if you take good care of them especially with their diet and leave them alone do their thing, you wont have major issues.
To be honest i have never kept them in an aviary. Only large breeding cages for pairs and smaller cages for song goldfinches but i have had friends keeping them in aviaries with the same type of issues.
Anyways i wish you the best of luck with them. And consider yourself lucky to be able to have them. Its been my 6th year in Canada and i still havent found a pair of goldfinches

take care