Climate change is having a significant impact on global crocodylian species and a temperature increase of two to four degrees could see a crocodile habitat in Moreton Bay says UQ Professor.

Emeritus Professor at the University of Queensland Gordon Grigg says future temperature increases will see crocodiles in Australia begin to migrate south and could one day end up in Moreton Bay.

Climate change will impact crocodilian populations, an expert says.

"If you think of going ahead a few hundred years or a few thousand years, they're the sorts of time frames you have to think of when you think the long term survival of animals; undoubtedly the habitat in Moreton Bay and further south will be suitable for (saltwater) crocodiles."

This means it is unlikely to happen in our lifetime but with global temperatures increasing at a rapid rate it remains hard to predict.