Remember this little guy? He is a tiny miracle of a Radiated Tortoise (Astrochelys radiata) . His egg had been broken during excavation of the nest (we have to excavate them or the eggs will die), and his keeper had carefully replaced the broken bit of shell and hoped for the best. And out he came with only a small cosmetic defect in his shell.
Now Meatball is a year old, and my how he has grown!
Right before Christmas, guess what? Meatball had a baby brother!
The hatchling should be a male because it was incubated at a lower temperature – 84F. A temperature of 88F produces females. This minute difference in temperatures is one reason why climate change can have a devastating impact on a species. A few really hot summers can result in more females than males, which sounds great at first glance. But too many females in the breeding population can very rapidly reduce genetic diversity.
This baby popped out right before Christmas. What a great surprise! The eggs weren’t even expected to hatch for a few more weeks. We check eggs every morning and afternoon, because we never know for sure. It’s not like incubating bird eggs, where there is only a day or two of variability in expected hatch dates. There can be MONTHS of variability. Like now. SURPRISE!
Now, back to Meatball. It’s hard to see how much he has grown in the last year until you see him beside his new brother. So here ya go!
And here are the two of them together.
There are still a few more eggs in the incubator, and Mom and Dad have done such a good job making babies that they no longer have the recommendation to breed, so we will be getting a different pair to work with. If we fill up zoo holdings with animals that are closely related, there’s no room in captivity for genetic diversity. Most zoo animals only have a few offspring. It may be a little while before we have more baby Radiated Tortoises. That’s okay. They’re worth waiting for!
What’s exciting in your world? I want to know!