Post by Geopelia
The difference in size does not seem to be a big problem for birds as it
would be for mammals. Mating would be difficult, but quite possible. The hen
controls the size of the egg, so egg laying wouldn't be a problem.
I wonder how the developing chick fits into the small egg, though. Perhaps
the smaller yolk keeps its size down.
The Galah isn't actually that much bigger than a cockatiel when all's
said and done (I know someone who has both myself) - it's a bit
bulkier, certainly (and 'fluffier', which makes it look bigger too)
but not really that much longer. I doubt that the size difference
would even be apparent in the newly-hatched chicks.
Do you think that the hybrid would've looked different if the parents
had been a male cockatiel and a female galah (more cockatiel-shaped
for instance)? I'm not really sure how the different species'
characteristics are passed down WRT cross-breeding.
Post by Geopelia
My diamond dove hen x peaceful dove cock hybrid lived for 16 years and
fostered many dove chicks. I also have a pigeon x laceneck dove mated to a
ringneck dove hen, but I don't think that cross is fertile. (They live and
One of my free-range ringneck dove cocks must have mated with a feral
laceneck hen, as a hybrid turned up in the garden. They are almost the same
I wonder if the galatiel will be fertile with either of the parent species.
I doubt it though.
I've often wondered if the hybrid gulls that're reported on the gull
mailing list I'm subscribed to are fertile. There seems to be a hell
of a lot of them around if the 'spotters' are to be believed (by the
looks of things, it seems that any species of large white-headed gull
can breed with any other).
Anyone have any info on budgerigar hybrids, btw? I remember reading
that someone had successfully crossed one with a bourkes' parakeet but
I can't find the page now.