Captive-raised saltwater crocodiles released into Bangladesh’s Sundarbans have surprised scientists by choosing to stay in the wild rather than returning to their original breeding facility, according to a study by Murdoch University. This unexpected behavior suggests that releasing mature crocodiles, rather than just young ones, might be a more effective way to help rebuild dwindling populations in the region. The Sundarbans, a vast mangrove forest, is home to one of the largest populations of saltwater crocodiles in the world, but their numbers have been declining due to habitat loss and poaching. Saltwater crocodiles are known for their strong homing instincts, often returning to the exact spot where they were captured. This behavior has made relocation efforts challenging, as animals typically try to return to their original habitats. However, the study found that three female crocodiles, raised in captivity for 8 to 22 years, did not attempt to return to their breeding facility after release. Instead, they established small, defined territories and moved in a manner similar to wild crocodiles that had been tracked in the area. In contrast, a wild crocodile named Jongra, who was relocated about 132 kilometers from his original home, exhibited clear homing behavior. He moved much more than any other tracked crocodile, covering large distances and even traveling over 30 kilometers in a single day. This stark difference in movement patterns between the captive-raised and wild-relocated crocodiles highlights the potential benefits of releasing mature, captive-bred animals into the wild. The study, titled "What is home? Post-release movements of captive-reared and translocated mature saltwater crocodiles in Bangladesh," was published in the journal Wildlife Research. It was supported by the Deutsche Gesellschaft für Internationale Zusammenarbeit and conducted in collaboration with IUCN Bangladesh and the Bangladesh Forest Department. The findings could influence future conservation strategies by offering a more effective approach to restoring crocodile populations in the Sundarbans.