by terry j wallace
I have both indoor and outdoor aviaries. The outdoor aviary is protected and heated but temperatures sometimes get to the mid 50's F. I have found that the normal RH. BH and OH gouldians do just fine but the yellows, silvers and blues are far more sensitive. I have had some of these gorgeous birds appear sickly, lethargic, dispirited and fluffed, and sleep all day ... and yet, when I bring them indoors, after just a few days, they become active, tight feathered and robust. They are like new birds.
I have come to believe that there is a vast difference in the environmental tolerances among the Gouldian breeds.
In short, the standard Gouldians can and will adapt quite readily but the recessive birds are not nearly as hearty.
You're absolutely right!!! It might be easier to understand if we think in terms of using the word mutations instead of breeds. I found the white breast green back to be the hardiest mutation followed by the yellow back mutations. You may already know this, but perhaps you and I can help another reader. It was my good luck that long ago an older breeder taught me never to pair two birds showing the same recessive genes. For example don't pair two white breast Gouldians. Always pair a white breast to a split to white breast, if you want to have more white breasts. Pairing birds with recessive genes to other birds with the same recessive genes leads to the production of weak offspring. This is so important for those breeders who want to breed for blue back Gouldians. While we can see the effect of a mutation of a feather color, I think there must be other mutations that have happened in these birds that we can't see that causes them to be less durable. To sum it up, I think the more mutations in a bird, the greater the chances are that their offspring will be less hardy.
Thanks for bringing this subject up! Jeanie