All recent breeding attempts by the species in the Czech Republic are believed to have been unsuccessful.

Giant girdled lizards do not breed readily in captivity, and only one record exists for a successful breeding attempt outside of South Africa.

On 3 July 1844, the last two confirmed specimens were killed on Eldey, off the coast of Iceland, which also eliminated the last known breeding attempt.

Both sexes care for young, and some offspring remain with parents for extended periods and through subsequent breeding attempts on Pohnpei (Kesler 2002).

But as noted above, the mortality is not evenly distributed throughout the birds' life, and only one young in three manages to live to its first breeding attempt.

Initial breeding attempts often fail, and in many cases newer pair bonds will dissolve (divorce) after unsuccessful breeding attempts.

This enables the breeding female may retain energy to be used within a new breeding attempt.

The first breeding attempt is usually at four years of age, sometimes at three years.

During most of the 1990s, the population remained steady; however with several successful breeding attempts in the late 1990s, the population began to climb into double figures.

In 1968, he initiated the first captive breeding attempt for endangered Chinese alligators.