70-100 days.
The following incubation times are average ranges: Tortoises, 70-100 days; box turtles, 60-90 days; water turtles, 60-85 days; and exotic tortoises, 100-160 days. Use these times as a guide; remember, there can be exceptions based on external factors. Always keep a spare light on hand because the original will burn out at some point during the incubation process. Desert tortoise eggs will hatch anywhere between 76 and 120 days, average time being about 85 to 90 days. Many water turtle eggs require the same length of time. Some of the more exotic species require up to six months (one African Pancake tortoise hatchling appeared after 210 days!); in these cases, it is best to check specific references, look on the internet, or network with other keepers to learn incubation time A number of readers have seen turtles laying eggs on their property and want to know what to do and when they will hatch. In general, box turtle nests have a high mortality rate due to predators such as skunks and raccoons. You probably want to protect the eggs in some way. Do not handle the eggs. It is much better to leave the eggs outside if at all possible. Back to FAQ. Right now, the data show that turtles in the south hatch out quicker-about 70 days, and in the north a bit slower-around 90-120 days, if they don't overwinter in the nest. Incubation period for Indian / Sri Lankan Star tortoise (Geochelone elegans) eggs is variable. Reports range from 47 to 257 days. In captivity, the average is around 90-120 days depending on the incubation temperature. Indian Star tortoise eggs can be incubated at a constant temperature. Burmese Star eggs on the other hand benefit from, or require, a cooling period before incubation. Temperature, humidity, rainfall, and other factors influence incubation. Generally, land turtle incubation ranges from 45-90 days (I know that's a long time to wait when you want to see baby turtles!). I suggest you start checking on the nest every couple days starting at the six week point. As far as protecting the nest, turtle moms usually choose their nest sites carefully Jupiterimages/Photos.com/Getty Images. Though wild red-ear sliders incubate their eggs in the sand, hobbyists generally have better success rates when they dig up the eggs and incubate them artificially. You will need some type of incubator, an incubation medium, a quality thermometer and about two months of patience.  Redfoot Tortoises lay rather large round eggs. Clutch size ranges from 1-13 eggs. In my colony they usually lay 4-6 eggs. Egg size is variable and seems to be related to the size of the female and the number of eggs per clutch. They weigh 30-50 grams and are usually 40-45 mm in diameter. Temperature, humidity, rainfall, and other factors influence incubation. Generally, land turtle incubation ranges from 45-90 days (I know that's a long time to wait when you want to see baby turtles!). I suggest you start checking on the nest every couple days starting at the six week point.  Incubating eggs. Much of the above incubation info applies to Burmese Star tortoises as well, but their eggs may benefit from an initial cooling period. This will help break the diapause (arrested development). According to Dr Liu, Burmese Star tortoises lay eggs 90-120 days after mating. Reports range from 47 to 257 days. In captivity, the average is around 90-120 days depending on the incubation temperature. Indian Star tortoise eggs can be incubated at a constant temperature. Burmese Star eggs on the other hand benefit from, or require, a cooling period before incubation.
http://www.chelonia.org/Articles/Incubating_eggs_DMS_.htm http://www.marietta.edu/~mcshaffd/boxt/eggs.html http://startortoises.net/incubation.html https://answers.yahoo.com/question/index?qid=20090512150413AAiPcIV http://animals.mom.me/hatch-redear-slider-turtles-11789.html http://www.redfoottortoise.com/redfoot_eggs.htm http://www.madsci.org/posts/archives/1998-08/899481528.Gb.r.html http://startortoises.net/incubation.html
how long do tortoise eggs incubation