When scientists studying the dynamics of a Norway rat colony in New York had some wild cats moved in on the experiment, they took the opportunity to see how the presence of cats and their behaviour influenced the presence and behaviour of the rats. Did rats move out when the cats moved in – or did … [Read more...] about Can feral cats limit rats?
Graeme Elliott has been studying our native birds for 45 years and using his knowledge we've put together an overview of how we can best protect our native birds in a mast year. A small reclusive bird the rock wren For him the message is clear, the main tool that can be used to reduce … [Read more...] about How can we help native species in a mast year?
There has been a lot of talk in the media about the beech mast and the mega mast. So what is it and why does in matter? Dr Graeme Elliot from the Department of Conservation shares his knowledge. Mohua/Yellowhead is sensitive to stoat predation. Graeme Elliott has been studying our native birds … [Read more...] about What is a mast event and why does it matter?
Urban landscapes are becoming recognised as important places of biodiversity. The concrete jungle can potentially be a great habitat for wildlife and having good biodiversity in our cities allows urban-dwellers to interact with nature in their daily lives. Photo: Auckland CBD (Wikimedia … [Read more...] about Auckland’s bird biodiversity revealed
Thermal squeeze: it’s what happens when temperatures rise, predators spread out to higher altitudes and their vulnerable prey species are squeezed into less-than-ideal pocket habitats at the outside edges of their range. Large, cavity-nesting birds may be particularly vulnerable to thermal … [Read more...] about Thermal squeeze could put pressure on native wildlife
Recently there have been several research projects looking at predators in the alpine environments of the South Island. It’s a completely different ecosystem to the much-studied lowland forest systems and there’s still a lot to be learnt about the key predator threats to our alpine species and how … [Read more...] about Latest research from Otago University and DOC investigates rock wren and 1080
The interaction between habitat restoration and predator control is a topic of great interest to us at Predator Free NZ Trust. In 2017 Manaaki Whenua Landcare Research created a series of info-graphics that looked at just that. Focusing on the Cape to City Project, they asked what do bird … [Read more...] about What do bird populations need to thrive?
Control possums, rodents and large introduced grazers and the forest understorey explodes with growth. It’s easy to think that this is what the original forests of Aotearoa must have looked like, before Man and other mammals arrived. But ancient Aotearoa had its own large herbivores – the various … [Read more...] about Moa vs Deer – are they so different?
Insects get eaten too. Scientists have reported that invertebrates have been found in 10-30% of cat guts and scats in the Mackenzie Basin, suggesting high country invertebrates, including some rare endemic grasshoppers, could be vulnerable to introduced mammal predators. Christchurch-based … [Read more...] about Insects get eaten too – so does predator control help grasshoppers?
It’s a world-wide trend and New Zealand is not immune. Wetlands are being lost – 90% of New Zealand’s wetlands have disappeared since European settlement. “Freshwater swamps, bogs, gumlands, pākihi, fens, marshes and seepages, are estimated to have occupied 9% of the New Zealand land mass or … [Read more...] about Loss of wetlands continues