Green anole breeding: egg-laying, incubation and hatchling care
Published by Planète Pets · managing editor: Clément Lacaille · reference guide rewritten with every source checked
The female green anole (Anolis carolinensis) lays only one egg at a time, but keeps laying throughout the breeding season. You find the eggs by sifting the damp terrarium substrate several times a week, then incubate them separately on moist vermiculite, at about 28 °C in laboratory protocols. Hatchlings are raised apart from the adults. This guide covers breeding only; for the terrarium, lighting and day-to-day feeding, see our profile on keeping a green anole.
Contents · 9 sections
Why the green anole is so well documented
A review by Lovern, Holmes and Wade, published in 2004 in the ILAR Journal, presents the green anole as a reference model for studying reptile reproduction. The authors point out that its natural history has been studied for more than a century, that courtship and mating differ by sex and season, and that the species is easily maintained, bred and reared in the laboratory. The protocols below rest on that foundation.
Before mating: breeders in good condition
Breeding is seasonal: in the wild it follows winter, and researchers catch their females in June, in the middle of the season. In captivity, pair only healthy adults, with a single male per terrarium: two males fight, as explained in our guide to green anoles in groups: cohabitation and beginner mistakes. The male displays by extending his dewlap; the female can store sperm and keep laying fertile eggs without mating again.
The female’s condition matters more than many keepers think. A study by Marks, Sorlin and Lailvaux, published in 2023 in Ecology and Evolution, compared well-fed females (three crickets of about 1.25 cm, three times a week, dusted with calcium) with rationed females (a single cricket three times a week). The rationed females laid clearly fewer eggs, and those losing weight laid fewer but heavier eggs. A breeding female must therefore be well fed and supplemented with calcium throughout the season: our guide to calcium and vitamins for reptiles explains how to dose the powder.
Egg-laying: finding the eggs in time
The female buries each egg in loose, damp substrate. Provide a deep area of unfertilised, slightly moist soil that you can search without dismantling the whole setup. In the Marks study, terraria were checked three times a week by gently sifting the substrate, a good pace to avoid leaving an egg to dry out or go mouldy. A female that swells, stops eating and does not lay should be seen promptly by a reptile vet, the only person who can diagnose egg retention.
Incubation: laboratory protocol and the effect of temperature
| Step | What the researchers did or measured | Source |
|---|---|---|
| Breeding females | Adults over 40 mm snout-vent length, housed individually in a room at about 27 °C | Marks et al., 2023 |
| Feeding the females | 3 crickets of about 1.25 cm, 3 times a week, with calcium; a single cricket reduced the number of eggs | Marks et al., 2023 |
| Egg searches | Sifting the substrate three times a week | Marks et al., 2023 |
| Incubation medium | One egg per Petri dish, on moist vermiculite, misted every other day | Marks et al., 2023 |
| Incubation temperature | Incubator set to 28.6 °C; daily checks for hatchlings | Marks et al., 2023 |
| Effect of temperature | Eggs incubated at 23.5, 27 and 30 °C: cooler meant longer incubation, the same weight at hatching, then often more growth over 8 weeks | Goodman, 2008 |
Place each egg in a small box on moist vermiculite, without turning it, then put it in a stable incubator. Temperature shapes what follows: a study by Goodman, published in 2008 in the Journal of Experimental Zoology, incubated eggs from four populations at 23.5, 27 and 30 °C. Cooler eggs took longer to hatch, with no difference in weight or size at hatching, but young from cooler incubations generally grew more over the following eight weeks, with differences between populations. Our article on incubation temperature and juvenile growth looks at this study in detail. What matters for the keeper: a stable temperature, measured at egg level, and patience.
Hatchlings: first days and first meals
When an egg hatches, take the young anole out of the incubator and set it up in its own terrarium, under the same conditions as the adults: heat, UVB, plants and misting. Do not put it in with the adults, which could injure or eat it. Its prey must be tiny: fruit flies and very young crickets, dusted with calcium. Our guide to insect size for reptiles by age helps you adjust prey as it grows.
Mistakes to avoid
- Two males in the breeding terrarium: fights and stress, with no benefit.
- An underfed female: fewer eggs according to Marks et al. (2023), and a female that wears herself out.
- Dry or compacted substrate: the female finds nowhere to lay.
- Checks too far apart: a forgotten egg dries out or goes mouldy.
- A fluctuating incubation temperature: it changes incubation length and juvenile growth (Goodman, 2008).
What we checked
- The DOI of each of the three studies was resolved on Crossref and its abstract re-read on PubMed.
- The protocol details (sifting three times a week, moist vermiculite, 28.6 °C, female diet, 40 mm minimum size) come from the “Materials and methods” section of the open-access full text of Marks et al. (2023).
- We give no incubation length in days and no figures for a winter cooling period: the verified sources provide no value that can be applied as-is to home keeping.
- We did not breed anoles for this update.
Frequently asked questions
How many eggs does a green anole lay?
One per clutch, but the female keeps laying throughout the breeding season. Her nutritional state affects the total: in the study by Marks et al. (2023), rationed females laid clearly fewer eggs.
At what temperature should green anole eggs be incubated?
Laboratories that breed the species incubate at about 28 °C (28.6 °C in the Marks et al. study). Goodman (2008) hatched eggs between 23.5 and 30 °C, with longer incubation at cooler temperatures.
Should the eggs be removed from the terrarium?
Yes, that is the method used in research protocols: the egg is lifted from the substrate, placed on moist vermiculite and incubated separately, which protects it from drying out and from the adults.
What do baby green anoles eat?
Tiny prey such as fruit flies and very young crickets, dusted with calcium, in a terrarium separate from the adults, with heat, UVB and misting.
Sources
- Lovern, M. B., Holmes, M. M., & Wade, J. (2004). The green anole (Anolis carolinensis): a reptilian model for laboratory studies of reproductive morphology and behavior. ILAR Journal, 45(1), 54-64. doi:10.1093/ilar.45.1.54
- Marks, J. R., Sorlin, M., & Lailvaux, S. P. (2023). The maternal energetic environment affects both egg and offspring phenotypes in green anole lizards (Anolis carolinensis). Ecology and Evolution, 13(1), e9656. doi:10.1002/ece3.9656
- Goodman, R. M. (2008). Latent effects of egg incubation temperature on growth in the lizard Anolis carolinensis. Journal of Experimental Zoology Part A: Ecological Genetics and Physiology, 309(9), 525-533. doi:10.1002/jez.483
In our shop, for this use: Stick-on digital thermometer for aquarium and terrarium glass (€18.90) · the whole shop
This guide is part of Planète Pets’s Reptiles universe. Our advice is general in nature: for any health concern, your veterinarian remains the only reference.