The Tiger Panthera tigris is a large and wide-ranging cat that occupies a variety of habitats, where it generally serves as the top predator. The tiger is also a flagship species(Dinerstein et al. 2007), and attention to protecting tiger populations and their habitats in Asian eco-regions has increased over the past few decades.

Over the last 230 years, the Australian terrestrial mammal fauna has suffered a very high rate of decline and extinction relative to other continents.

Determining whether species have gone extinct requires considering the timing and reliability of records, the timing and adequacy of surveys, and the timing, extent and intensity of threats. However, previous assessments have either applied qualitative approaches or considered only the first of these factors. We applied quantitative methods encompassing all three factors to a suite of 61 potentially or confirmed extinct species of birds.

A detailed study on the regeneration ecology of Aristolochia indica L.