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The Sumatran tiger struck at about 2am local time in a protected forest in Indonesia's Aceh province, with local officials saying they plan to "rescue" and "relocate" the creature because farmers had been working illegally inside the area

A pioneering campaign to vaccinate endangered monkeys in Brazil against yellow fever may help save the beloved golden lion tamarins from extinction

Data suggests male northern quolls rest less than females and spend much more time on the move, leading to their death after a single breeding season

A deep trawl has brought up a potentially new species of a fish whose extreme mating methods include permanent physical fusion

The fish has been causing havoc for Sunraysia irrigators after a population boom, and now it is being detected by Riverland growers.

As the climate heats up rapidly, many species will struggle to avoid extinction. If they had time, they could evolve to the new environmental conditions. But they don’t. That’s where hybridisation could help. When related species interbreed, the flow of new genetic diversity could help them adapt to warmer environments.

A species of small, carnivorous marsupials is picking sex over sleep as males travel the equivalent of up to 40km a night to find a mate.

Researchers say that the population of western monarch butterflies wintering along the California coast has rebounded for a second year in a row

Researchers say the mating drive of northern quolls overrides even the need for sleep, putting the endangered species at further risk.