Using maths to decide when to put dogs on leashes

One dog’s fun is another bird’s terror. Repeated disturbance by dogs can stress and even kill shorebirds. (Photo by Kiran Dhanjal-Adams)

Using maths to decide when to put dogs on leashes

Reducing the threat to our endangered migratory shorebirds Key messages: We sought the most cost-effective allocation of patrol effort among sites with a limited budget to help manage disturbances to migratory shorebirds We demonstrate a straightforward objective method for allocating enforcement effort while accounting for diminishing returns on investment over multiple visits to the same […]

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An adult male orangutan in a Kalimantan oil-palm plantation, now an
endangered species. (Photo by Nardiyono)

Prioritising restoration in Kalimantan

Mention Indonesia and images of soaring rainforests and orangutans come to mind. But the reality is quite different. Over 63% of Indonesia’s forest estate is currently deforested or degraded (that’s around 83 million hectares), and many of its iconic species such as the orangutan and proboscis monkeys are endangered. And the deforestation marches on. In 2012 Indonesia broke the record for clearing tropical forest. The choking haze from burning forest and peatland has blanketed South East Asia many times in recent years, and awareness of the economic and health hazards associated with this is growing.

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Burning questions for black cockatoos

The gregarious Carnaby’s cockatoo (Calyptorhynchus latirostris) are such a common sight in Perth that it is easy to forget they are endangered, and that the urban and agricultural expansion of south-western Australia has removed the bulk of their habitat. How we manage their remaining habitat will have important consequences for the species’ survival.

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