We remotely tagged 24 of these little critters throughout 2007 and 2008. The tags provided information on body temperature, diving profiles, and the horizontal movements of crocodiles as they free-ranged throughout their freshwater habitat.

Some of the crocodiles produced some remarkable behavioural feats, with a 5 kg animal diving for 5 hours 45 minutes and walking/swimming over 6 km in a single night. The data is helping us to understand how the freshwater crocodile utilises its habitat and optimises its cost of living.

A mature female Crocodylus johnstoni, captured on a night survey at Lakefield National Park Nth Queensland

Dr Hamish Campbell