Sergio Guerrero Sanchez is a Cardiff student working on his PhD on monitor lizards (in Malay ‘biawaks’). Monitor lizards comprise the genus Varanus originating in Asia at least 65 million years ago. The largest monitor lizard is the komodo dragon found in Indonesia. On Borneo, the water monitor lizard is the largest species capable of growing up to 3 meters. The biawak is a generalist eating just about anything and capable of living in lots of different conditions. Because it is a top predator they have the capacity to provide useful information about pollution in the environment. Sergio is not only studying the biawaks to infer ecosystem health, but also looking at the effect habitat fragmentation from palm oil plantations is having on the species. Data is collected with the use of gps ‘backpacks’, microchips, and scale/blood sampling. Sergio is trying to link physiological values with ecological tools to elucidate factors that drive the dynamics of the population in the fragmented landscape and the consequences of this adaptation. However, because biawaks are generalists they are still abundant even in these fragmented landscapes. Sergio’s research is very important as habitat continues to be destroyed and animals come face to face with these problematic obstacles. If we can increase our understanding on how different species are responding to habitat fragmentation, we will be better equipped to help them persist and as a consequence mitigate the loss of biodiversity.