Way back when (it does seem like an age ago), I wrote about candling reptile eggs. Remember this picture?
This egg is from an Oustalet’s Chameleon, the largest species of chameleon in the world. The egg is smaller than it looks. The light shining on it is 1/4in wide. These eggs are small, about the size of my pinkie fingernail.
Many species of lizards hatch in about 60 days. These eggs were laid way back in July 2014, and the first signs of development weren’t seen until six months later. We knew this lengthy incubation was normal for Oustalet’s Chameleons, but we didn’t know much else. So often, species that are considered to have adequate numbers in the wild are overlooked for captive breeding programs, sometimes until their numbers drop and it’s too late to turn things around. Those who do breed them are often private keepers, and they don’t always think to take the best notes.
This is our zoo’s first clutch of Oustalet’s Chameleons, and I’d like to share what I have learned, the good, the bad, and the things that will give you grey hairs.
There doesn’t seem to be much obvious courtship. The guy finds an agreeable lady and does his thing. A female who is not carrying eggs is bright green with white spots down her sides. Once breeding has completed and the female is gravid (carrying eggs), she turns greenish or tan with ribbons of red. This coloration is a visible cue to any passing males that she is officially off the market. Click photos to enlarge. Resolution and color is enhanced when the pics are larger. Weird.
The female carries the eggs for a couple of months, and then she deposits the clutch, which my consist of as many as 60 eggs, in a hole she has dug with her hind feet. They dig deep, too. A foot of substrate is ideal for her to work with. Though the eggs show no signs of development for many months, it’s easy to pick out the healthy, fertile ones. After a few weeks, the infertile eggs collapse and turn rather yellow, while the good ones stay nice and plump and turn white (known as “chalking up” in the trade).
The eggs may develop at different rates. We have no idea why. Our tray of eggs was incubated at room temperature (our Main Area ranges between 76-78 degrees), but some eggs began to show their first sign of development (see photo) well before others. Same temps, same box, same relative humidity, but a few eggs were quicker to begin developing.
Fast forward to late May. We began to find these:
A sweating egg means hatching is imminent. But even after ten months of incubation, nothing happens quickly. The egg with the goo on it did produce a live hatchling, but not for an entire week. After two days, the egg began to collapse. A day after that, slits appeared in one end where the baby chameleon used its egg tooth to shred it’s way out.
And then we waited some more. The baby spent its remaining time within the egg resting and absorbing its yolk. Three days after the first slits appeared, we had our hatchling.
Stay tuned for Part II on Monday. I have so many images to share, I couldn’t fit them all into one post. Trust me when I say it’s worth the wait.