There is no definite age which you can no longer incubate a fertile egg, but the fresher an egg is, the better chance of a successful incubation and hatching.
round about three years or maybe four depending on the type of bird/reptile
Thirty days
21 days
Duck egg incubation can be from 27 to 35 days depending on the breed.
A cold pigeon egg does not neccessarily mean that its dead. Until incubation starts, the egg will be left cold, once incubation starts the egg can chill for as long as an hour or more if the weather is not too cool, and it will still hatch.
Depends upon the avian species. Most common (farm wise) is the 18-28 day range, but a few are shorter and a couple are longer.
Egg incubation
a bouncy egg is actually an egg without its shell thus it may last for two to three weeks .... but the problem is that it will smell of the acid which u pour on it
The word "incubation" directly refers to the time an egg needs to be kept warm before it hatches. Since cows do not lay eggs, they do not have an incubation period. They have what is called a "gestation" period. This gestation period is generally 285 days long.
incubation
Tasmanian devils do not have an incubation period. The term "incubation" relates to how long an egg takes to hatch, and Tasmanian devils do not lay eggs. The gestation period of the Tasmanian devil is between 18 and 21 days.
Yes. It can.
All reptile eggs need incubation to hatch.